Lol, I agree. I'm in the process of building a basement home. I'm all about efficiency but I think I'll have to take a pass on the compost toilet and other hippie crap.
Standard sizes are 20’ by 8’ by 8’; 40’ by 8’ by 8’; 40’ by 9.5’ by 10.5’; and 45’ by 9.5’ by 10.5’. The latter two are called “high cube” containers. These shipping containers are designed for ship, rail, or road transport. All it would take would be to run in the water, sewerage, and electrical to a site. Do the necessary foundation prep and then bring the container to the site and plop it down. Conversion and finishing could then be done on-site. Or, the container could be prepared and converted off-site, trucked, to the site, off-loaded, and hooked up. Sort of like a Wausau Home.