I very much agree with what you've said... but I'd personally have no interest in a typical trailer park, or anything "high density". Too much noise and not enough privacy. A park with an option for a couple acres+ per person and lots of freedom regarding the type of dwelling would be nice, but you'd probably need to start from scratch or add on for that.
Freedom and solitude are highly prized among nomads; at least the ones who could afford to live in a regular home but choose not to. I enjoy people, groups, crowds, etc very much... in small doses. For nomads the community could serve as a home base... that would be some of the appeal to me. I think I'd like a very modest hovel with a shed where I could build and work on things. I'd pay for the share of land, and my buildings, and would be happy to contribute to group facilities and necessary infrastructure. As TBBadger mentioned being able to share resources to reduce cost is a valuable quality for a community... but I'd prefer if most of that was voluntary.
I have no interest in a commune... since I think that makes things more complicated rather than simple, and tends to attract people who don't wish to grow up and take care of themselves. I wouldn't want to be in a community where every time someone has a problem, it's everybody's problem. Most problems are between the person's ears (including mine!), and that's where the solution lies. Projecting inner struggles (and hopes and dreams) on other people and other things just makes a greater mess.
Does a homebase appeal to anyone else? If so, what features would you like it to have? For me it would be a place I visit for periods, but I wouldn't reside there for most of the year. Later, maybe a good place to settle if I get too old to roam. I do believe that for practical reasons some people will need to be there all year to run and manage the place. That's a job.
I was thinking maybe a commercial RV park and cabin rentals might be viable, in conjunction with individually or collectively owned buildings and RV spots, which could be rented out when the owner is away. For instance if you prefer to just park your rig when you are there (no other buildings) you'd own a RV spot that could be rented out when you are gone; you just schedule it in advance. If you have a cabin, then it would work the same way. Optional of course if you'd rather not.
IMO in the great majority of the US the weather sucks for at least half the year. I'd rather have a homebase some place where the climate is moderate, sunny, and relatively dry, so it's nice to be outside any time of year. That would be the southern CA coast... which is way too over run and expensive... and the higher elevation parts (5-7k ft) of southern AZ, NM... and even TX (around Alpine/Marfa/Fort Davis)... which are all very sparsely populated and cheap.
What do you think?