There is a logical, sensible, cheap, commercially available form of housing that you can prefab, stack, transport: 40ft-housing-containers. Those are normal 40f

There is a logical, sensible, cheap, commercially available form of housing that you can prefab, stack, transport: 40ft-housing-containers. Those are normal 40ft sea containers with a housing interior. You can load them onto anything that can transport such a container, nothing exotic or problematic, just run-of-the-mill reach stackers, trucks, ships, etc. They are cheap because 40ft-containers are mass-produced, and you can make them either out of new cheap container parts or reuse an old one into a home. Electricity is usually a 32A-3phase-CEE-connector in every corner which can also be used to chain multiple containers. What is trickier is fresh/waste-water connections, but also not really a huge problem. Biggest problem with those right now is that manufacturers are overwhelmed due to demand for refugee housing in Europe.