***And some of these are just crap.***
I could show you a small town full of abandoned trailers. They do look like crap.
On the other hand, we had a home builder who built real shoddy stick built houses. His favorite way of shafting people was to buy an old termite ridden single story abandoned house, pull it to a new foundation, put nice siding on it, blow a little insulation in the attic, and I DO mean a Little, then pass it off to new buyers as a NEW HOME!
I hope he was sued to poverty for that.