Actually there is a growing number of people living well and living cheap and living BELOW the radar.
Wife and I sold our company and full timed RV'd for a year, for us that was enough and we sold our motor coach of 45 feet got back where we had dirt under our feet. Several years later we bought a camper for our F 350 truck, we lived in it for about 3 mo when we bought our ranch while we were doing work on the house. Over the year + the 3 mo living full time in RV parks we met a lot of nice and great folks, still friends with some of them 10 years later. The following are some observations:
Truck camper living was costing us about $400 per mo, total, you can get you mail there also. Met no shortage of people living full time in RV parks, moving based upon weather or family. They are semi retired. They work as handymen, maids, McDonalds and many have various small businesses that are straight cash only. Many of these folks are flying below the radar of life and want it that way. Many are drawing SS which covers their base costs, food etc. Some work a legit 'W-2' job, but many work for cash and are making $1000 or more per month. Often gross income is $30k per year with no taxes or taken out at all, all cash. These folks are living quite well, they only pay cash and get paid in cash. They are quite happy and glad to have the freedom of no govt in their life.
So what is like to live in an RV. Well our motor coach was big and about like living in a small apartment. The truck camper: We LOVED IT. Not kidding, we have 4 dogs, one weighs 85 lbs, the other are small <14 lbs. We have fridge, AC, central heat, tempurpedic mattress, microwave, walk in bath, cable TV/satellite TV all in a neat package that slides into the bed of my F 350 crew cab, long bed truck. We arrive, I push a button the camper lifts, I drive out from under, push a button and sit it down and we use the truck to drive around town, shop etc. In fact I know a lot of folks with truck campers and none of them think its too small. They are very well organized, lots of storage and really a lot of fun. In fact there are a lot of full timers TC's and its a rapidly growing segment for those that want to get off the grid under the radar.