Camper vans.love em! At the moment we have a citroen relay home (not by us)conversion.It's not the best, but it serves us well. Panel vans such as transits and the relay/boxer are a bit wider than a VW trooper. Loads of people are going for imported Mazda bongos and you can get some really good ones but you can get some dogs as well. You might not get such good mpg round 25 I've been reliably informed but most bongos are 4 wheel drive.They are also quite small we though as we looked at them a couple of years ago. We've had small converted vans (Morris marina) when there was just us two and cozy. Bigger VW camper vans. Devon conversion and another (can't remember the converters at the mo) Last year Mrs viking, myself and daughter went to Germany, France, Switzerland, Holland and all round the top of Scotland in our X reg (2000) converted panel van.(8000 mile round trip, six and a half weeks) Keep under 6 metres and the ferries are cheaper. We belong to the motor caravaners club.
There are very many to choose from and the quality varies hugely from almost a wreck (cheap)to super but at £1000's.
I've got to say I'm impressed with Collierland's site and wish I'd known sooner !!
We have a drive away awning which serves as shelter, recreation, daughter bedroom, indoor dining when cool or wet. It saves our space on crowded sites. We have electric hookup but don't use it when wild camping. Leisure battery but of course limited life even when driving around to charge it.
As daugher now 16.5 is getting a bit big for mum n dad, we are considering a Romahome for just the two of us. That way we'll get rid of the cars.
It depends on the complexity of van you require. You can do it basic up to top luxury at a price.
Bone cruncher is right when he says be careful of home/DIY conversions. We got ours checked out by the Xperts, electric included and beware of the kerbside weight as well. Loads of good advice available, take it. Good book is "The motorcaravan manual" by John Wickersham. Most of the van people you meet are brilliant people and most helpful.