The problem with water damage is if you are seeing some evidence on the interior it's usually worse when you open that area up. Not always but often it is. Did you look at the bottom of the slides carefully, often times if you push on them you might hear crunchiness of bad wood or feel softness. Often near the outer corners.
I always buy used stuff but you have to be covered for the worst case scenario. if I didn't have the resources on hand to do numerous repairs and even large repairs like thousands for a transmission or engine I wouldn't buy it.
Class A is probably the most common RV out there but to me it carries a high degree of risk. All of the RV issues are there from water damage to refrigerators or whatever plus a drivetrain.
With a towables when you get past the RV issues like water damage or a bad propane refrigerator you really don't have much mechanical suspension to go wrong with it. you can buy many axles from numerous places for about $450 each complete with brakes and hubs.
You do also have to have a tow vehicle then but the tow vehicle can be driven everyday it can be resold much easier than some RVs. If anything happened to the RV and it was in the shop you still have your vehicle.
It's all about money and risk so again I wouldn't buy something like that and ride off in it unless I had at least $10,000 or so sitting there that I could dump it if needed. that doesn't necessarily mean the spending would be over I would just have that question if that cushion isn't there I wouldn't mess with that. That's your finances and you only you know that part but that's what the risk is about.
There is a big difference between a person who has to pay for everything and someone like myself who could pull the engine or transmission out and rebuild it. DO NOT let fevers or emotions get involved in this or you could easily be taken advantage of