Construction: the bedrooms would be hexagon shapes. The reason?
   Construction materials would be cheapest. Imagine 4x8 sheets of
   3/4 inch plywood set 4 ft to a side. Hexagon. You'd get the
   maximum amount of floorspace AND most importantly, the units
   could easily be expanded. one hexagon next to another, next to
   another, some with doors, some with windows. prefabricated, easy
   to build. "