Freedom to live in multiple places throughout the year. If retired, probably keeps life more interesting than staying in one spot. Some RVs are really nice. There are some that cost about a million. However, I've seen quite a few really cool ones for around 250,000. Some just use them recreationally and still have a home. While others, who live in them full time, have the advantage of moving around. And it still cost anywhere from 600 to 1200 or more per month just for hookups at each place. Most are gated with a resort type atmosphere and offer activities for the retired visiting them.