First time buyer - how bad is water damage

We bought a used motorhome in Florida. We found a crusty old guy who owns a ridiculously busy shop, with a loyal following, and asked him to do a pre-purchase inspection. He asked if we were new to RVing, we replied no. He then said, "Well you know well enough to not waste your time or mine, bringing a rig with obvious water damage for me to approve, since I won't". Nobody should EVERY buy a water damaged rig, unless it's stupid cheap, and they are a great DIYer. Water damage is no different than an iceberg. The part you see is ten percent of the problem. The real damage is below the surface, and typically WAY worse that your would ever imagine. Regard the pics. posted by the OP, no way, no how, nope, never.

EDIT: Just noticed that the OP was going to buy a ticket and fly to look at this thing. As I may of mentioned, no way, no how, nope, never.