Hey, I've been talking about this with folks for awhile now, I live in Southern WV ( Flat Top).
By the letter of the law, what you are talking about it a private community, or a HOA. Example in SWV are Glade Spring, the Greenbrier or Flat Top Lake. While it's completely possible to build a community like those in these parts and I really wish we could get folks together to do it, you have to have a clear set of rules, ownership and lots of legal pretty words. (again which all can be done) The problem in these parts, is that the folks that want a private community, don't always have the permaculture mindset. The folks that want the ecovillage mindset, don't have the independence mindset.
Here is the compromise I'm thinking might work in the Appalachia. Think Mount Airy, a small town where folks own their own stuff, but have a unifying ideal of what they want their small town to be like. I think SWV has some good bone sitting around in some of the old coal town, or forgotten farm communities. They key would be a community meeting point.
Another option is to recreate something like Colonial Williamsburg,(The working display town, not the time era) where it all setup as a Non Profit, folks live and work in the community, and folks from away come and take class or tour.
Eitherway, I'm good at paperwork for LLC and 501(3)c. DM me and i'll share my contact info and anyway I can help. Look up
The Mavis Institute if you want to see what I'm building right now.
Cheers
-Justyn