While a Airstream is a real nice thing another alternative when looking for big vans and in this case one that doesn't weigh more than a bus and cost more than a Greek Island is the Grandcruiser.
This particular 28 footer is a bit old, but it's still a nice van and this brand of van has about the best sound and heat insulation of just about any van on the market. The new ones are a good thing and unlike most other vans hail isn't a worry for them as they are mostly fibreglass.
2006 Grandcruiser Extreme Caravans in Victoria - caravancampingsales.com.au
Here are some better pics of a much newer 24 footer. Note the payload of 800 kg which is nearly double what most van manufacturers allow. This mob who are located in Newcastle custom make vans to thier customers designs as well.
http://www.caravancampingsales.com.a...=0&pss=Premium

