One thing to note here is the implicit assumption that "everything can be scaled with tech" fell flat on it's face. I don't think there's any good reason to believe that flipping houses scales well. For two reasons.
1) This is a space where the individual profit-motivated entrepreneur, who really knows her stuff well, is typically going to outperform the W2 salary corporate employee. The stuff that successful flippers know, the experiences in terms of what a "can of worms" does, and doesn't look like, isn't stuff you're going to learn in a book, from a class, etc, and the people that do know that stuff probably aren't interested in being W2 salary employees.
2) Robots. If you are building 50,000 cars, using robots is great, and the more cars you're looking to pump out, the more that robots/algorithms/automation will make sense. But each house is different, these don't scale up like that, even two model match homes, same year, same blueprints, same community, etc, are going to be different. Having 5,000 houses you're trying to flip means 5,000 individual human general contractors, 5,000 unique cases. One thing we know about independent contractors is that the bigger the customer/client is, and the deeper the pockets, the more profit the independent contractors will be able to squeeze out, one way or another. In fact, I would argue that the more houses you're trying to turn over, the GREATER the per unit input/labor costs, since no one managing 5000 things at once can tell if the GC is full of it, or not, when they say this big extra surprise $30,000 thing needs to be done (does your "local boots on the ground" agree that this $30k thing needs to be done b/c they agree, or b/c the GC slipped them $1,000? No one is going to feel bad about ripping zillow off...). I think Zillow recognized this, that's why they were mostly buying complete/functional houses and just throwing carpet+paint in them. Note even here, though, that from all that I've read (a lot of this is reddit anecdotes), it was almost a one-size-fits-all approach, they were tearing out 1-3 year old carpets for new(er) carpet, painting over freshly painted walls, and so on.
Also, Zillow has not responded to my message or called me back.
