My suggestion for anyone starting a community is to read Creating a Life Together by Diana Leafe Christian. I don't agree with absolutely everything it says, but it raises all the problems you're gonna run into ahead of time so you go in prepared, and maybe you sidestep some and maybe you don't but at least have the awareness that the wheel has been invented (or misinvented) many times before.
Also Paul's podcasts on community and
Permaculture Thorns booklet.
The HOA idea is great. Maybe put in that people don't get to have any sewer or septic systems--must do willow feeder or better. Water could be a shared well but then you're required to pay up front for maintenance fund or put aside materials to maintain or something. Let he HOA code be as radical as you need it to be and trust people t meet you where you're at--where the earth's needs are at.
Dancing Rabbit ecovillage is another good example of a decentralized ecovillage that has strict covenants for
sustainability and has measured a 1/10th impact of USA average resource. There's also
Alan Booker's community he's designed in Alabama for contract.
It might be a
project to approach as a developer even...raise the capital, do a kickstarter, I don't know. Individualism has its place.
Lastly you say you're not emphasizing community, but you can create a space for it to emerge through smart design. It isn't forced function, but it's encouraged. Cohousings have shared space, put the mail room as far as possible from the parking lot so people are compelled to pass by more other people and pass by the common area and see people sitting there having fun--that builds community in an organic way. Neighbors out in the countryside, in my experience, are very much eager for connection, and will put in the effort more than
city folk, but it would help if the layout didn't require driving to get to your nextdoor neighbor. I think you've addressed this basically in your clustering of houses, but there's another level of detail in this that, if you really get it right, can add some more spark to your design. Think of it as slowing, sinking, and spreading flows of people
energy like you do with water.
(Also I think there are a few intentional communities already in West Virginia, which may be a a helpful resource for info and even people helping out, I don't know).
That's my two and a half cents. Good luck.