The OP asked about financial benefits only. Generally, if a person even has to ask this question then my answer is to buy used. I also asked this question as well so I am not judging in any way.
There are no financial benefits in buying new. None. FACT. Numbers are not debatable or swayed by opinion. Especially on a luxury item. If you want to maximize your financial benefit then buy VERY used and then use the hell out of it :) This is assuming a modicum of research into your used purchase prior to handing over the cash to make sure it isn't trashed of course.
That said, there may be many benefits that aren't financially related like lack of odors, time to search for a good deal, lack of warranty, and the list goes on and on and on. But the OP didn't ask about those benefits. They asked about financial benefits.
Still, this is a personal matter for each person to decide what is best. In my case, why would I want to owe money to someone for 15 years on something that I only use a few times a month at most? I paid in cash what many people put down on a new RV for a perfectly wonderful used RV with everything working on it and in amazing shape. I think most people confuse NEED and WANT. IMHO, need and want don't get closer together until you are talking about living in an RV full time or if you are buying an RV with a specific purpose in mind.
Of course, we all do slightly different things with our RV's so YMMV.
That said, good luck with whatever you do buy! You are going to love it and have a blast. That is the real benefit! ;)
