Can be done - not ez, but may be worth it. Research jointly owned airplanes for a very mature industry that does this.
Register / own / insure through an LLC Montana preferred by many RV, boat, airplane, exotic car LLC's) Follow the rules to a T. (Don't miss ANYTHING) (MT=sales tax free (lifetime plates on some vehicles)
Have strict use policy (mileage and time and schedule, kids, pets, towing...) as well as a
mandatory hired Maint and
cleaning (detail) shop.
Set up appropriate 'reserves' (repair / replacement)
Agree in writing of critic safetly issues such as what brand and class of tire and brakes is acceptable!!!
Have a STIFF mileage rate, disincentive for LONG trips (MH depreciate FAST.)
Annually do a complete survey / update (Especially hoses, filters, genset, waste system, wiper blades...)
Good idea to do this in New Zealand! Let me know if you need a partner! (diesel ONLY, I don't do GAS (dangerous and wasteful)). I would like it staged near Christchurch
(Cheaper fares, better terrain, less people)