But I'm glad we made the command decision to build the basement house. We're dug in to the hill tighter than a tick on a dog. Virtually no exterior maintenance with two thirds being underground, easy to heat and cool and all one level. We're not getting any younger.
Over in Europe and Asia are several developments centered on using the Intermodal containers for both offices and apartments. I know London has done some very interesting developments. Some of these remodels are astounding in their creativity.
Other non-traditional housing I've considered is the Monolithic Dome home. The MD home is built on an inflatable membrane (that becomes the outside ‘skin’ of the home). Inside the dome, the walls are sprayed with several layers of insulating foam. The final layer of foam contains re-bar and it is then sprayed with shotcrete (sprayable concrete). The walls of MD homes are about a foot thick and they are impervious to almost all natural or man-made forces. (The walls are also proof against a .30-06 rifle at pointblank range.) Checkout the Monolithic Dome Institute site.