Some older handicap vans (big ones) were built this way. They started with a new cube van chassis, added a 4wd transfer case and front axle and drove the front wheels only, then cut the chassis off behind the cab and added a custom rear chassis section. These were on the road for many years. Properly done this would work great – not saying this one is done right but I’ve seen a lot worse. The connections to the van chassis is the critical part of course but his one looks well done, good body work too. The rear chassis can be just normal trailer stuff. There’s lots of mini vans available,,,hmmm.
A 3.3L minivan will haul a 2nd gen camaro on a trailer, slowly, but with no real problems (don't ask me how I know).
That one should be lighter, and if built right would be an interesting, but underpowered, car hauler. I hope there is enough brakes. When I did it, had electric trailer brakes plus the van brakes.