Years ago I was 'gifted' a 21-foot fiberglass sailboat by Lake Dallas Marina.All I had to do was get it to my place,where it's languished longer than I'd like to admit.
Reversed,inverted,and raised a bit,she''l be a somewhat heavy,but robust gooseneck trailer shell for a tandem axle subframe.
It will be like a larger 'Papoose',with fully-integrated wheels.
The existing prow makes for an ideal boat tail.The transom is extremely robust and will facilitate attachment of the hitch mechanism.The Lincoln stick-welder is waiting on me for materials to construct the rotisserie she'll be mounted to for the buildout.
If we can have 'boat car' art-cars,we can have boat-trailer RVs.