Now comes the WHICH sized 35' 5w do you have? one of the non slide? single? double? triple? quad? of even one of the 5 slide 5w's? IIRC tho, max sq foot for a trailer to stay an RV is 400.......
The real question is, are you wanting to literally live on the boat as a replacement to the trailer? or have both per say? if both, a smaller "LARGE - mid 20' " trailerable boat may the best option. If selling the RV and living on the boat is the goal, then a 35-40 sailboat is on par with a 30-35' power boat sq footage wise.
She drives me boat,
I drives me dinghy!