You might want to do a search on schoolies or little homes...probably more wood stoves in them than in factory-built RVs. I don't think I would care to have a wood stove in my motorhome, given how poorly most fair in the event of a fire (and how quickly the fire spreads). That said, with enough work and care, I suspect a safe installation could be possible.
The main problems I foresee would be having adequate clearance and heat shielding around the stove and getting an appropriate safe chimney of some sort. That you aren't going to be taking it down the road is, of course, a distinct advantage for the chimney installation.
Possibly a marine/yacht stove would be the most practical; boats have similar sorts of space constraints as do RVs, and are often made of similarly combustible materials (at least boats in which a wood stove would typically be installed).