The Rexhall Vision 25 is really short for a Class A as it's length is really is around 25'-26' bumper to bumper. It's a wide body too.
With a fully loaded racecar, trailer and supplies (incl up to 30 gallons of fuel); 3/4 fuel and full water in the RV; food and other supplies the combination came in at under 18,000 pounds(exact specs are in the RV and I'm 20 miles from there).
For its time the Vision was built rather uniquely. It features 1x2 steel 'studs' built into its foam laminate structure. A similar foam laminate roof is then welded to steel wall studs. Very strong and very light. A fair amount of care was taken in its construction to be as light as possible within its price range.
But the reason racers love this thing is that the RV is about the same length as an F-250 4 door with an extended camper in the bed. One racer I know uses a Super Truss with that combo and tows a 20' trailer!
They don't usually let RVs park with the campers right next to the trailer, but since I'm so short I can park the RV in one spot, the trailer and car in the next spot and not use up more than my allocated space.
Just because it appears racetracks have "all the room in the world" doesn't mean they have parking for 300 racers with all their gear.
As a guy who is a 'fabricator' who is currently building another racecar I do agree that the current 5k receiver is not up to snuff. It features a square tube with 6"x6" plates (roughly) welded to the frame. I'd prefer 4 point loading like a Class V hitch in order to spread the WD load along a longer section of frame. Yet another project ...