Promising description above, but I gotta say the project website doesn't inspire a lot of confidence that this is a realistic, viable, competent endeavor...I imagine there's a lot more thought/planning behind the scenes, which your post seems to point to, but that public facing presentation could really use a more concise, polished touch! I get what you're saying about building vs launching, and maybe it's still too early to articulate who/what this community is about, but presumably it begins with a big chunk of up front capital/credit from somebody(s) with specific aims, values, tastes etc and I think at least that much should be clear from the jump to get others on board with any level of shared commitment.
Financing a large long term 'startup' community venture is hard and brings with it necessary inequality of stake, input, responsibility, governance, and at some point I think you have to embrace that and roll with it while you set out a roadmap towards more stable, grounded, cooperative sustainable structure. I'm just a little thrown off by somewhat scattered and potentially conflicting elements of the vision as expressed there, such as whether this is meant to become a city, village, or rural retreat. Intrigued, but want to share hopefully helpful critical feedback at this point. Good luck! Lots of potential around NorCal right now for smart rural revitalization and conscientious regenerative development, no doubt.