There are some precedents for this type of thing, mostly involving religious groups.
>LDS in Utah.
>On a smaller scale, and in more recent times, Bhagwan Shree Rajheesh moved about 3,000 people into rural Antelope, Oregon. They immed. had the voting power to get their members elected to town council positions, and actually renamed the town to "Rajheesh". Ultimately, they were unraveled by denial of building permits at the county level, and they responded by trying to poison said county officials. Ultimately run out of the area, arrested, and had their property (incl. 50-odd Rolls Royces) confiscated.
>Anyone remember Bo Gritz, and his Kamiah, Idaho housing development "Almost Heaven"? Separatist compound against armageddon. Haven't heard much about that lately.
Without the religious fervor (some would call cult worship) to convince followers to sacrifice as necessary to get this type of operation off the ground, its hard to imagine this concept gaining in a secular framework. That is, UNLESS things get a whole lot less comfortable in the country.