I went and checked out this thing yesterday, it is REALLY COOL! Just reeks of old-school german engineering (with a Cummins under the hood).
Engine started up and ran great, owner claims around 15mpg. Has the propane tank, burner unit, floor heater, sofa bed in the back, refrigerator behind one of the cabinets, and storage at the running boards. Measured about 22' long, 9'9" high, and 7' wide on the outside. Inside has a raised roof behind the front seats, at least 6'2" high.
All in all, not a terrible vehicle. Everything is dead simple, the drivetrain is solid, just needs some interior work and systems installation. He didn't want to add a sink and water tanks because it would be classified as RV.
He needs it gone, so make an offer and see where it goes! Really nice guy, he had good ideas for it but too many vehicles on the property.
Building a pretty cool truck, driving internationally for the next years!