How much do I offer for a brand new 2017 Ram 2500 Diesel?

There' really nothing cost effective about RV'ing. RV's depreciate at an alarming rate. Storage runs on average depending on size $50 month=$600 year=5 years $3000. RV's after 5 years -50%
Poor MPG's while towing. Trucks depreciate as well. Maintenance on both. Unless you are full timing then RV'ing needs to be looked at as a hobby, same as ATV'ing, boating, etc.
It boils down to your fun to money loss ratio level.