Saw a new remote living "cabin" for sale now for 60 grand. Self contained 160 sq foot the size of a 20 foot shipping container.
I'm not seeing any good pictures of the outside of it, but in true realtor fashion they feature tons of pictures of the inside of it using the standard realtor fish-eye lens:
I predict in a few years we might find a few of these strewn throughout the backcountry abandoned by their owners after they starved or killed their darn selves somehow, after they've air dropped onto their remote land one of these puppies along with a month or two supply of fuel and of course the obligatory bag of rice (just in case).
Doesn't seem real sustainable using denatured alcohol for heat and cooking, but putting a woodburner in there just doesn't seem feasible from many points of view.