If they aren’t for you then you don’t have to buy oneI don't really see the point in them unless you're retired or can have long periods off. The idea of having 2 weeks off but spending at least a quarter of it dragging a caravan through Europe instead of getting a plane doesn't make sense to me. If you can go away for 6 weeks or more and take a mini house with you then I get it.
They suit older people and young families where being limited to a hotel room doesn’t work.
When you get a few families together the younger children can be out playing all day until late, and the adults chilling with a BBQ and drinks. Try doing that with a hotel room !!