No its not.
You can absolutely build 200 hourse for $135 a square foot or even less and make money selling them.
Well if you truly believe that, and you are somehow correct and have a way to do it, then whatever line of work you are in is the wrong one. You literally would have the ability to monopolize the entire new construction housing market, and solve a problem that is plaguing the entire nation right now with sky high home prices for first time buyers.
All you gotta do is start a company (or just work as a consultant for an existing one), and teach whoever how to build those $135/sf new houses, and sell them. Then, count your millions. Don’t let naysayers like me stand in your way….