https://en.wikipedia.org/wiki/Sears_Modern_Homes https://en.wikipedia.org/wiki/Sears_Modern_Homes Depending on how utilitarian you want and are allowed to be,

https://en.wikipedia.org/wiki/Sears_Modern_Homes https://en.wikipedia.org/wiki/Sears_Modern_Homes Depending on how utilitarian you want and are allowed to be, you might also look at "metal buildings", timber framed walls and roof over a concrete slab. The expense in housing is in the interior finish anyway.