Speaking of which I used to watch MTV Cribz back when I was a kid. The cars were rented, and the homes apparently never even belonged to the celeb. Was all manufactured, which I understand given the amount of crazies, celebs would not want to show off their homes. And the cars being rented to maintain their status.
I was watching an episode a while ago (forgot which one) where it was obvious the two rappers had never even been in the house before, like having to look around what sort of room it was before saying 'this is the lounge' or whatever. There was a picture of a sail boat that they looked at for a bit, slightly perplexed, and then said 'yeah this is a picture of a boat because we like boats' or something like that. It was hilarious.
From stories I've heard from exotic car rental companies, it seems they end up renting to people basically at cost and the real money is made when they ship out 10 cars at once with a full time handler for a photoshoot.
Now there's a growth market