Unknown or erroneous title on single axle fifth wheel

This is a brand new "CRAWLER/HAULER". built by Ft Worth, Texas United RV Center. United is a standard RV dealer and decided a few years ago that the market here wanted this type cheaper Toy Hauler. AS the pic shows, they remove the drive train from a brand New Trailer and then mount it on the Gooseneck Flat bed Trailer. Doug

https://www.unitedrv.com/rv/2021-CRAWLER-HAULER-NTT3957

Do a web search for truck camper on a trailer and there's no shortage of innovative ideas. Something like this gooseneck equipment trailer made into a toy hauler:

I would like to see a pic of this trailer. Follow This Link to post pics.

I wonder if there's a market for a trailer designed specifically for this purpose. Could have extended tanks, built-in generator or more batteries.
I would make it a gooseneck.

A 6000lb single axle on a short gooseneck trailer could carry a lot of TC and add-ons

If you could post a pic that would be very helpful. I have never heard of a fifth wheel that small, much less one with only a single axle, so I'm inclined to agree with the DMV that this is a home made rig. While it's true that truck campers don't need tags that's only because they ride in the truck bed. Generally speaking, anything with tires that rolls on the road needs tags.

Weekender is a brand of truck camper (here's one) so the camper itself is factory made, what makes it a "home made" is taking a truck camper and converting it into a fifth wheel by putting an axle under it. Whoever had it probably didn't have the right truck to tote it around and by converting it to a 5er with a very light pin weight could pull it around with a small truck like a Ford Ranger.

If the title is from the state you live in I'd go up the ladder at DMV. Either DMV or law enforcement signed off on the title. Another loophole is LE knows TCs don't need tags so they might never bother you.
Skyline did make a Weekender 5th wheel back in the day.