I owned/drove a bone stock 69 VW Bus Panel Van years ago. This one has been extensively modified and clearly the craftsman has some experience with sheet metal fabrication. I have questions about the location of the radiator/AC condenser since I'm assuming the new Subaru boxer engine is water cooled and it's using the Subaru AC because, IIRC, AC wasn't available on VW vans of that vintage. There is no pic of the rear so the radiator/condenser location is unclear. The suspension, brakes, wheels/tires, steering geometry, weight and balance are surely adversely affected with all the extra weight. It's an interesting vehicle and attracts attention but, at $40,000, would not attract my money. In that price range, it's missing a few of the essentials like rooftop A/C, refrigerator, toilet/shower, propane, generator, oven/range top, waste water storage, etc. Those would all be available in a short (22-24 ft.), aging Class B/C for substantially less money.
If you want an older VW motorhome, this might be a better option:
https://rvs.autotrader.com/rvs/1995/Winnebago/Rialta/300181611
But hey, if you want a conversation piece, this conversion is it.
Chum lee
Edit: On reviewing the photos (enlarged) on my smart phone, it appears that the VW factory sheet metal (painted gray in ad) has major rust through issues around the driver/passenger door bottoms, wheelhouse openings, and, front panel, which is common to VW Vans of that vintage. If I'm correct, this issue has been previously improperly/poorly repaired and repainted, and, the owner knows about it, but, failed to mention it in the ad. IMO, without being insulting, that drops the value of this "$40,000 collectors item" to, . . . . . . . scrap value.