The Homestead Reddit looks like one place for stuff about sustainable living. Survivalists are also thinking about this stuff, but you'll need to filter out the crazy there. Probably better to look for people already living outside population centers rather than the office workers who debate the number of tactical knives to have in the bug-out bag in their living room closet.

Some sort of commune would help with the setup and maintenance work, but then you may get problems with freeloading, incompetence and general drama.