As with any used RV water leaks can be a giant killer in a hurry. You might find a shop that does SealTest. Basically they pressureize the interior and spray soapy water all over outside they them identify and mark all air leaks. You can then choose to fix ot have them fix. As with any motor home, tires are also a big worry. Unless you know they are new or nearly new I would strongly suggest you look up date codes and if their over 7 years replace them.
BTW, yes, RVs can be a money pit and guaranteed you will never recover it.
