Maybe not what the OP had in mind, but if I were thinking about living a mobile life, this would be high on my list:comes with its own little trailer to haul bikes, you can detach the camper/living space and drive away, it is self-contained by solar power, and has enough space for a couple of people who get along well.
http://www.tonke.eu/en/collection/de...eldsleeper-en/