I curious how good the infrastructure -- the plumbing/electrical/network/appliance hookups -- are in this sort of thing, and how repairable the fixtures are. If I have to sledgehammer a wall out to replace a bad outlet, I think that would get pretty old pretty quick. Having built some boats, and having lived in an old abandoned boat through college (somehow getting the thing shipshape on undergrad money, although I took shortcuts that would curl my hair now) I can testify that the hull is the cheapest part of the boat. All the other stuff is the hard part. Houses are sort of like that, but a lot less critical than a boat hull at sea. The walls and roof are just chunks of stuff.