Hi everyone, this is Fatima (KB). I’m currently building an AI voice agent for HVAC businesses using Retell AI, and I’d really appreciate some clear guidance from people who have real-world experience. My situation: - I understand the basics of Retell AI, n8n, and Make.com - I’ve already built a simple working voice agent - But I’m confused about how to structure it properly for real clients - Different YouTube tutorials suggest completely different approaches, which is slowing me down What I need help with: 1. Architecture - Should I focus more on a strong system prompt or build a structured conversational flow? - What’s the best way to handle real HVAC calls (bookings, inquiries, emergencies)? 2. Tech Stack - What tools are actually necessary to start selling this service? - When should I use Retell alone vs integrating n8n or Make.com? - Do I need a CRM or database from the beginning? 3. Real Business Setup - What is the minimum setup needed to start getting HVAC clients? - What features do HVAC business owners actually care about most? 4. Workflow - What should the full workflow look like from incoming call → AI handling → lead storage → follow-up? 5. Scaling - Once I get my first 5–10 clients, what should I improve or automate next? I’m trying to avoid overcomplicating things and just want a simple, practical roadmap focused on selling and delivering results. I’d be really grateful for any advice or real experiences you can share.