I saw a fix and flip show the other day- these guys had put all new kitchen and bathroom and flooring in and ignored the termite wings- but half way through, the kitchen floor joists had to come out and be rebuilt, then the living room floor and then the living room ceiling trusses- I think the snow was zombie flip, they had at least 8 flips going at the same time, so other deals were funding this massive mistake- basically a full house rebuild that was not easy to notice for experienced people- 4 of them(agent, 2 contractors and the money) would walk in and "inspect" every house. Most experienced would not do all levels of an inspection(ask for a deal instead of al la carte pricing) , but if replacing a sewer would kill your deal- $330 is cheap insurance