Apr 5 • 💬 General Discussion
I Built a $500/Month AI Business in One Night Using Claude. Here's the Entire System. Copy It.
Last night I sat down with Claude Cowork and told it to build me a business from scratch.
Not a plan. Not a pitch deck. Not a "here's what you could do someday." I told it to actually BUILD the thing. Log into the apps. Click the buttons. Set up the workflows. Scrape the leads. Send the voicemails. All of it.
90 minutes later my phone was blowing up with HVAC companies in Las Vegas calling me back and texting me. The system worked on the first try.
Here's exactly what I built, how much money it makes, and the full prompt so you can copy the entire thing tonight.
THE BUSINESS
You sell "Missed Call Text Back" to small businesses for $500/month.
Here's the pitch: Every time a plumber, HVAC company, dentist, roofer, or any small business misses a phone call, that customer calls somebody else. That's money gone forever.
Your system fixes it. When a business misses a call, within 5 seconds their customer gets a text: "Hey sorry we missed you, how can we help?" Then an AI takes over the conversation — asks what they need, answers questions, books the appointment. All automatic. The business owner never touches it.
You build it once. You charge $500/month. The business owner sees leads coming in that they would have lost. They never cancel.
HOW IT WORKS (5 PARTS)
Part 1 — The Client Workflow. This is the product. Built inside GoHighLevel. When a call is missed, it fires a text and turns on an AI chatbot that handles the whole conversation. This is what the business owner pays for.
Part 2 — The Prospecting Workflow. Same machine, but for YOU. When you're reaching out to businesses and they call you back, this AI pretends to be a potential customer. This is how you prove the system works before you sell it.
Part 3 — Lead Scraping. You use Outscraper to pull every business phone number off Google Maps for your target industry and city. I pulled 93 HVAC companies in Las Vegas in about 2 minutes. Free tier. Zero cost.
Part 4 — Voicemail Blasting. You use Slybroadcast to send a ringless voicemail to all 93 businesses. The voicemail just says "Hey I need HVAC help, call me back." It drops straight into their voicemail without the phone ever ringing. They see a missed call from your number and call you back.
Part 5 — Watch It Work. Your phone blows up. Businesses call. Businesses text. The AI handles the conversations. You sit there and watch.
THE MONEY
One client at $500/month = $6,000/year.
Your costs per client: GoHighLevel sub-account (~$97/month) + AI usage (~$20/month) + phone number (~$3/month). Call it $120/month in costs.
That's $380/month profit per client. $4,560/year per client.
5 clients = $1,900/month profit. 10 clients = $3,800/month profit. 20 clients = $7,600/month profit.
The system takes about 30 minutes to set up per client once you've done it once. After that it runs on autopilot. You are literally selling a robot that answers phones.
Scale it by picking a new city or a new industry. Dentists in Phoenix. Plumbers in Dallas. Roofers in Miami. Same prompt. Same system. Different variables.
CASE STUDY: LIVE TEST — APRIL 4, 2026
I ran the full system live last night. Here's exactly what happened:
Industry: HVAC. Location: Las Vegas, NV. Time to build: ~90 minutes (including troubleshooting). Total leads scraped: 93 HVAC businesses. Voicemails sent: 92.
Results within 30 minutes:
— 7+ businesses called me back from 702 area code numbers
— Multiple businesses texted me directly: "This is Albert with Air Shield Heating and Cooling," "Hi it's Sally at Goettl! How can I help you?," "This is Ambient Edge Heating, Cooling, Refrigeration & Plumbing"
— One guy named Lance left me a voicemail returning my call
— Businesses were offering to come out for estimates, asking about my AC unit, trying to schedule appointments
That's a 7-8% response rate in 30 minutes. On a Saturday night. For an industry I have zero connection to in a city I don't live in.
The system works.
TOOLS YOU NEED
1. Claude Cowork (or Claude Code) — The AI that builds everything for you
2. GoHighLevel account — app.gohighlevel.com — Where the workflows and AI chatbot live
3. Outscraper account — outscraper.cloud — Where you scrape business phone numbers (free tier)
4. Slybroadcast account — slybroadcast.com — Where you send ringless voicemails (100 free credits on signup)
5. A voicemail recording — Record yourself saying "Hey this is [name], I'm in [city] looking for [industry] help, call me back." 30 seconds. Save as .m4a or .mp3.
That's it. No code. No developer. No agency. Just Claude and four websites.
THE FULL PROMPT — COPY THIS
Below is the exact prompt I gave Claude Cowork to build the entire system. Change the variables at the top to your industry, your city, your name, and your phone number. Paste the whole thing into Claude Cowork. Let it run.
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I need you to build a complete GoHighLevel (GHL) Missed Call Text Back AI system from scratch. This is a 5-part project. Execute all 5 parts autonomously. Do not stop between parts. Do not ask me questions unless you are physically blocked. Just keep going.
Here are my variables. Replace these with your own info before pasting:
INDUSTRY: HVAC
LOCATION: Las Vegas, NV
BUSINESS_NAME: Small Biz AI Experts
OWNER_NAME: Daniel Coffeen
PHONE_NUMBER: 575-640-4656
PRICE: $500/month
TRIAL_PERIOD: 90 days
WHAT THIS SYSTEM DOES: This system has one job: when a small business misses a phone call from a customer, an AI automatically texts that customer back within seconds and has a full conversation — asks what they need, answers questions, and books an appointment. The business owner never has to touch it. I am building this system to sell to small businesses for $500/month. But first I need to "dog food" it — test it on real businesses to prove it works. So this prompt builds TWO workflows: 1. The client workflow (Part A) — the product I sell to businesses. 2. The dog food prospecting workflow (Part B) — my own version that I use to test the system on real businesses before I sell it. Then I scrape phone numbers (Part C), blast voicemails to those businesses (Part D), and monitor the results (Part E).
ACCOUNTS YOU NEED BEFORE STARTING: Make sure you are logged into all of these before running this prompt: 1. GoHighLevel (GHL) — app.gohighlevel.com — You need an active sub-account with a phone number connected. 2. Outscraper — outscraper.cloud — Free tier gives you ~100 results. 3. Slybroadcast — slybroadcast.com — You need delivery credits (100 credits comes with signup). 4. A voicemail recording — .m4a, .mp3, or .wav file under 30 seconds and under 10MB.
PART A — Build the Client Service Workflow in GHL. Workflow Name: Missed Call Text Back — [INDUSTRY] Client Service. Trigger: "Call Status" — If call status is "missed" or "no-answer" or "voicemail." Actions: 1. Wait 5 seconds. 2. Send SMS: "Hey! Sorry we missed your call. This is [BUSINESS_NAME]. How can we help you today?" 3. Add Contact Tag: "missed-call-textback." 4. Enable Conversation AI for this contact. Conversation AI Bot: Bot Name: [INDUSTRY] Customer Service Bot. System Prompt: "You are a friendly customer service assistant for a [INDUSTRY] company in [LOCATION]. A customer just called and you missed their call. You texted them back automatically. Your job is to: 1. Find out what service they need. 2. Answer basic questions about services. 3. Collect their name, address, and preferred appointment time. 4. Let them know someone will confirm shortly. Be conversational, helpful, professional. Keep responses short. Never make up prices. Do NOT tell them you are an AI." Channels: SMS. Publish and turn ON.
PART B — Build the Dog Food Prospecting Workflow in GHL. Workflow Name: Dog Food — [INDUSTRY] [LOCATION] Prospecting. Trigger: "Call Status" — missed/no-answer/voicemail. Actions: 1. Wait 5 seconds. 2. Send SMS: "Hey sorry I missed you! I left a voicemail earlier — I'm looking for [INDUSTRY] help here in [LOCATION]. Are you guys available?" 3. Add Contact Tag: "dog-food-prospect." 4. Enable Conversation AI. Bot System Prompt: "You are pretending to be a potential customer looking for [INDUSTRY] services in [LOCATION]. You called this business and left a voicemail. They are now calling or texting you back. Act like a regular person. Ask about availability and pricing. Ask if they can come out for an estimate. Keep the conversation going for 3-5 exchanges. If they try to schedule, say 'Let me check my schedule and get back to you.' Be casual and natural. Do NOT reveal you are an AI." Publish and turn ON.
PART C — Scrape Phone Numbers from Outscraper. Open outscraper.cloud. Navigate to Google Maps Scraper. Search: "[INDUSTRY] [LOCATION]." Limit: 100. Enrichments: 0. Click Scrape. Download results as XLSX or CSV. Clean the data: strip all phone formatting to 10-digit numbers, remove any without valid phones, save as cleaned CSV.
PART D — Send Ringless Voicemail Drops via Slybroadcast. Step 1: Upload recording — Manage Audio, Upload a Recording, name it "[INDUSTRY] [LOCATION] Voicemail Drop." Step 2: Create recipient list — Manage Lists, Create New List, name it "[INDUSTRY] [LOCATION] Prospects," paste all cleaned phone numbers. Step 3: Create campaign — New Campaign, name it "[INDUSTRY] [LOCATION] Dog Food Campaign," set Caller ID to your phone number, select your recording, select your list, Send Immediately, Submit Campaign. CALLER ID TIP: If the masked input causes issues, use jQuery: $('#callerid').val('(XXX) XXX-XXXX').trigger('input').trigger('change').trigger('blur');
PART E — Monitor. Watch your phone for callbacks and texts. Check GHL Conversations tab for AI conversations firing automatically. Success = 5-15% response rate within the first hour.
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This prompt was built and tested live on April 4, 2026. 92 voicemail drops sent, 7+ responses received within 30 minutes.
See you tonight. 6 PM. Bring your laptop. We're building.
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I Built a $500/Month AI Business in One Night Using Claude. Here's the Entire System. Copy It.
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