First, real estate in US designed to be the sink for excess money globally gained by nefarious means, sell and make the money clean. Second, all the prep work

First, real estate in US designed to be the sink for excess money globally gained by nefarious means, sell and make the money clean. Second, all the prep work before actual construction costs the same regardless of the size of the home. Its profitable for builders to build large homes (cheaper per square foot) and sell them at a premium. Third, zoning laws that make anything thats not a SFH mostly illegal to build. Fourth, manufactured homes are illegal in most areas. Finally, The building codes are localized to each county, there is no federal/state building code. As long as these perverse incentives exist, costs are not going to come down.