I would ignore it completely, at least 3 huge variables there, down payment, interest rate and length of term, 5, 10 20 years, and or 20 year but renewable after xx years at a higher interest rate.
I would start looking at the asking price (which is Negotiable).
Before signing, commiting to buy, shop for financing, start with your own financial institution to see what is affordable and the best deal for the money. Yes, the RV dealers will do that as well.
Maybe you can get more RV for the same money, or the same RV for less money.