Please excuse my ignorance, but where do I get someone to inspect an RV? That makes sense, but I would have no idea where to find someone.
I live in the tampa area so there are many..you would preferably want someone certified by the nvria (national recreational vehicle inspectors assoc.) here is there link: https://nrvia.org/
If you can’t find an inspector in your area I would find a reputable mobile rv repair service and have them do an inspection..most, at least in this area will do that. Also depending on the type, if motorized (diesel or gas) you could have a certified mechanic inspect the chassis. The chassis quite often can be the most expensive repairs unless you have a leak in the house then all bets are off...leaks can be very expensive to fix...
Hope this helps..let me know if you need any other information.