If you're thinking about a tripod, I think the general consensus is to keep your money in your wallet
Realistically, you can take two ratchet cargo straps, hook them to your front landing gear in a crossed manner and tighten them (be careful not to bend your landing gear) and get better stabilization than with a tripod.
I'd suggest saving your money for a steadyfast system (but not before you actually try living in your RV and see if you really need more stability than what you can achieve with the jacks and other items you've yet to try to use.