My idea would to combat climate/economic change

ie Drought/floods/fire/earth quakes/tidal changes/economic instability and migration.

The relocatable building would be designed like a concertina, collapsible with structural ribs and flexible walls, roofing and flooring. With kitchens and bathrooms housed in a rigid end pod. The external wall colour to suit climate. The buildings would be a light weight flexible structure, easily manoeuvrable and transportable. Land would be rented rather than owned allowing much more flexibility for migration. The buildings could be transported by road, rail, sea and planes around the world and erected and collapsed within days. Expand and contract to suit sites and family size, easily stacked.