The US military came up with a better idea. Just take an ordinary steel shipping container, and with a conversion kit it is suitable for a family of four.
You start by digging three slit trenches in which you lay three PVC pipes for electricity, fresh water and sewage for a whole “street block” of containers. Then you punch three holes in the bottom of each container, that riser pipes for each of the three lines can stick up through.
The door side of the container faces the “street”. Electricity is the first slit trench, for both light and to power a portable, one burner electric stove. Fresh water comes up in the middle of the container, and is split, with a pipe going to a front of the container plastic sink, and another going to the rear to run both the shower and toilet. The sewer line is at the rear of the container, for toilet flushing, shower water and the sink which can be dumped in the toilet.
The interior sides of the container has four drop down bunk beds on chains, which are upright during the day. Then the entire container but the front is covered in dirt, which acts as insulation.
Imperfect containers are torn apart to be used as sidewalk. Other community services, such as a mess area, school, and clinic are put in tents.
Interesting!
Were you in Afghanistan or Iraq???? I helped build those in Bagram.