Maybe New Grey Panthers? I'm glad you mentioned them, I had forgotten all about them.
I hear you about the cynicism and about people who just talk and talk but don't take action. And I don't have a clue about organizing people into a group, or marketing an idea, or anything. About 20 years ago, I got very interested, even then, in quality affordable housing that would be actually affordable; in housing communities that would be sort of "multi-purpose" communities, e.g., an apartment complex with an onsite daycare so mothers could go out to work. Something ideally based on a kibbutz or other successful co-op community. But I had no idea how to even take a first step.
But one good thing that I got out of it was the idea, from some people who had tried similar things through government and other organizations, was that if people who needed something like that, also wanted it, if they could start one on their own, based on their needs and wants, then maybe it could grow into something bigger as it succeeded. Say, start with a duplex community and expand it into some sort of larger intentional community.
I know of at least one horse person online who wants to retire to a planned, intentional community for horse people; they are talking about buying land and building on it. so I know there are people out there who want to do this sort of thing and have the wherewithal to do it. But although I have had friends who lived alone, like me, and did not have a lot of money, like me, I have never had any who wanted to share a house, or any other sort of co-op intentional community, to share expenses and just companionship.
But I would still like to try.