OP i'll add that while our 08 handled our boat fine enough, i've no idea on how it will handle a travel trailer. At highway speed that could be quite the resistance against the wind as you pull, I'm wondering if you shouldn't also try one of the Toyota forums (such as
Toyota 4Runner Forum - Largest 4Runner Forum) to get some real world advice on what you want to pull from more owners.
Seems a travel trailer is like a pontoon boat--the total weight may be reasonable but the lack of aerodynamics can cause issues. Just thought i'd toss that in there....
As for price, out of curiousity i went on autotrader using a 100 mile radius of my location, no 2010-13 4wd's under 25k but a couple listing in the $25-30k area including some with lower miles did pop up. So your price range may at least be close once all negotiations, etc are done. But it could be slim pickings as far as what you can choose from for colors, models, etc.