VW T3's are on the up in value but only for the right van and can be a complete money pit if you buy a shed, they rot for fun and the petrols are very thirsty. Have a look at
www.brick-yard.co.uk if you need to know anything more in depth.
Bongo's are in a similar league to a Delica in the fact that they're more of a day van than a camper.
If I was to drop five grand on a camper I would be looking at converting an LT35 (early sprinter shape, different front end) or an Iveco Daily, nice and big, built for the mileage and modern diesel engines give good cruising speeds and mpg's. LT's are also not as "cool" as the transporter series so you get a lot more van for your money, a nice one could be picked up for around £1500 if you take your time looking, leaving you £3500 to get it kitted out to your exact spec which buys a lot of materials if you're capable or woud maybe even get the van converted to a basic level.
I've currently got 2 VW T4's and a share in an old shape LT35 (mystery machine shape), watch out for "scene tax" within the VW world as it's easy to pay over the odds for a knacker, there are bargains out there but eBay tends to drive prices up.
If there's anything else you need to know, drop me a PM. Hopefully be moving the T4's on in the next couple of months because I've got a T5 ready and waiting which might have to have a stealth camper conversion (I'm not a massive fan of windows in smaller vans...)
