Join KOA and check out their financing partner. Last time I checked, they had very good rates. And they understand the RV business better than many credit unions. Loan term might be more flexible with a cpmpany that specializes in RV financing. As a retiree, prepare a budget and make sure the payment is affordable. If you have a spouse, make sure they can handle it in case you die prematurely. The loan might be upside down, especially in the early years of the loan. I.
I'm a tax guy and recently had a case where the husband died unexpectedly, the wife was saddled with an RV loan she couldn't afford, and had to sell the RV at a loss.
Todd