I've thought about getting one a couple of years back but there hell-ishly expensive to buy even on the 2nd hand market! .
I did think about getting something like a Transit size van or minibus and then converting it with a bit of help. Did a bit of homework and would of been cheaper than buying something that's already done.
I may still do the idea in a few years time when my riding days are over, mind you when it gets to that time I may also have to think of fitting a chemical toilet as well, as I won't make it to the camp site ones in time!
Hey Neo I've got a minibus for sale if ya want to give the conversion a try! I got it to convert to a day camper for when I went track day racing but didn't go to plan this year!.... Now can't be bothered with it! Lol