Here in central Texas, I've seen a few new RV parks pop up, mainly because the existing ones tend to be jam-packed at all times of the year. Usually the parks are on back roads, but not too far from a main highway.
If I had eight digits to spend, I'd probably buy 40-100 acres, create a few driveway loops (one loop for families, another for partiers, another loop for people who want to be well away from the first two, and another for long term residents that has multiple entrances out and in.) I would also spend money for a good Internet uplink, so I can provide Ethernet connections and even some local cloud services for permanent residents. From there, perhaps have a shuttle to and from events (SXSW, renaissance faires), so people don't have to worry about having to find parking at the event.
