One of the major problems of the time in which we live is the current stigma against exploitation of mentally and physically ill people for public entertainment. If these people weren't amusing the rest of us, they'd just be draining someone's resources somewhere, without giving anything back.
AFAIK, nobody involved is a slave or otherwise being held in bondage.
Weird they don't just do it in the southwest, where the land is cheaper and abundant af, unless part of the deal is at the end they flip the house and sell it for a cool 1mil after the improvements. That'd be smart, and eating from both ends.