I appreciate all the notes of caution. The cost is astronomical but they are sure cool. There is one builder in particular, Otzi, that has a contractual agreement with Mercedes. Their built out vans become an officially recognized Mercedes model number that Mercedes fully supports. Very impressed with their build quality. Apparently this also saves lots of money on insurance.Way too expensive. Not to mention RV techs won't touch 'em, and once the manufacturer modifies the van, many auto-techs don't want to work on them either, there's too much question about that the heck they did.
We did look at a van when we started the journey, there's just no way to justify that price tag.