Perhaps we should look into kick starting and crowdfunding solar punk technocratic communes in rural middle america.
Not to poo poo your fantasy or whatever, but this sounds like every tech bro's "build an island country" when they get their first billion.
Most cities weren't built where they were purely by chance or coincidence. Infrastructure is hard and complicated to build, and relies on natural resources being somewhat available locally in most cases.
Even if you manage to build it, there's no guarantee they will come.