A friend out in West Texas has a couple of these in the buildings on the compound they are building out there. Since they are so far away from any towns that any builders who would do the pre-fab house they have in mind cost a large fortune, he has built all of the "out buildings" first and they live in several. (One day, they'll build a house. . . ) The garage, the storage shed, the radio shack (I think that's their main domicile) and an Airstream trailer are out there, and maybe more. When they have company, depending on their level of competence, they house them in a building with the facilities they can handle. His in-laws go in the one building with a flush toilet and a septic system.   :)

SRS