I'll answer the question directly. I'm single, and for the last 10 years or so I've been living in my RV, mostly in a fixed park while I work fulltime. But I also take off for extended vacations, and that means I just pack up and go. When I leave the park my rent payments stop, I can then apply that money towards travel instead of trying to fund a vacation while also supporting a fixed residence.
Besides, in temperate climates living in an RV is like living in an efficiency apartment. Having done both, I much prefer living in an RV. There's space between me and my neighbor and we don't share common walls, floors or ceilings. Having lived in a couple of apartments, I find RVers to be much more considerate of their neighbors than the typical apartment dweller. Loud music is the exception, not the rule, and there's no creaking bedsprings from the upstairs neighbor or the sound of my other neighbor's headboard hitting the common wall between our bedrooms in the middle of the night. <g>
I started living in an RV when I moved to the San Francisco area in 2000 in the middle of the dot-com boom. Real estate prices rose so rapidly the only purchase I could qualify for within commuting distance of my job was a condo, and I'd had enough of apartment life. I had a 5th wheel I used for vacation travel, so I moved into it intending to buy property when the real estate market settled down. But it never did, and I wound up liking the RV lifestyle.
Plus the cost of living in a RV park is a half to a third of what it would cost to rent an apartment, at least here in CA. The difference went into my rainy day, travel and retirement fund. I've taken numerous extended vacations including two month long trips to Australia, and I will be financially secure when I retire in another couple of years.