I would be only looking at motorhomes based on Ford Transit, Mercedes or VW. I once owned a Talbot Express Campervan, a real nail, I was glad to sell it at a loss. My daughter and her husband own a Taxi business, there's two Fiat Scudos in the fleet which are constantly in for repair...losing money!!, but no trouble at all with their VW's. My vans based on the bomb proof MK5 Transit, not the prettiest, not the fastest, not the quietest but totally reliable, and easy to work on, with cheap spares, if anything did go wrong. A big plus is the gear shift going straight into the box, no cables and rods to foul up. Rear wheel drive means removing the gear box and drive gear is a doddle = cheaper repairs. As with all small commercial vehicles just make sure it's been "waxoyled".