Suggest, a review of the state statutes relating to titling for RV's. What the authorities want are taxes/fees for a heavy truck and an RV taxing schedule would mean a lot less $$$$ to them from what I have observed. To try too decipher the law seems a big task at times because again the authorities want $$$$ so the heavy truck fees are all they want to see.
Case in point; My 1999 K2500 Suburban was titled as a heavy truck over 5k lbs used commercially, but I do not use this vehicle for commercial enterprise nor has it ever been used for such enterprise, but once it is titled that way it's like the title/taxing/authorities now can't see, hear or speak of any remedy and only want the heavy commercial truck tax/fees.
I've researched this thoroughly I know in Florida the vehicle has to have one (1) of the following to qualify as RV "and fifth wheel equipped vehicles do not apply";
Wired 115 volt circuit, fresh water w/plumbing, or toilet.
What qualifies as for 115 v circuit? Inverter "wired".
What qualifies as water w/plumbing? How about a Jerry water can w/hand-pump!
What qualifies as a toilet? A porta potty or similar device.
Then the next problem is the insurance industry if the vehicle was not upfitted as RV by some commercial entity.
Anyway, good luck with your quest.
1999 GMC K2500 BURBAN, NAVISTAR enhanced 6.5 td aftercooled, dual alt's, PSC p/s pump w/HD cooler, redundant FSD's, HEATH program, turbine/downpipe wrapped, 4" SS exhaust, real time OBD2 data logging w/device controller, EVANS waterless coolant @ zero (0) psi & 135 gpm pump, 4L80e w/kevlar and premium steel w/cryo treated input/output shafts running @ 100 deg. F & 140 deg F towing, all synthetic fluids, AMSOIL bypass system, MileMarker hydro, dual fuel tanks, and on and on, questions PM me.