Imagine if you could come up with a surveying strategy for quickly laying in water and sewage, and then put these type of houses over top of them for disaster relief. It could be pretty cool.
It can’t compete with a FEMA trailer.
Plumbing, water supply, HVAC,gas, electric... Can all be in the slab; just like here in the USA.
Plumbing vents can be on the exterior; as sometimes used in Europe.
One combo squat toilet/shower, one kitchen sink, a few electric receptacles in the floor and propane tanks delivered by motor scooter; good to go!
Add your own insulation and subdivide for the inlaws!