I work in an adjacent industry to construction and I can tell you that even the $300k houses are so cheaply made that you would refuse to live in one of you saw them being built.
I've seen stucco being sprayed on exterior "walls" made of Styrofoam (polystyrene), and broken studs toenailed together before the drywall gets hung. That's not even mentioning the number of times I've seen human shit on the floor of the garage.
The number of times these building companies have been sued for breaking building laws would make your head spin. A company in Florida got sued by an entire subdivision because they poured the foundations on the water table and the first rainstorm flooded every house.
It's criminal how much these companies fleece from the American public.