RV Financing
If you have enough equity in your home, you could get enough to pay the other bills and THEN also buy the RV. The downside: you will owe more and more on your home. The advantage: a home mortage is usually at lower interest rate than a conventional loan for an RV and the payback time will be longer. Putting the RV in a home equity loan would make it all tax deductable, not just the interest as in a conventional loan.
Lenders look at RV's as a "luxury purchase". If the credit is close, I have seen them turn down a loan for the RV. An equal loan for a car or truck probably would have been approved. With that thought, you might want to consult with your banker and get their advice. They are the ones that know your situation best.
Good Luck, you will enjoy the RV once you get it.