Look for any signs of water intrusion, i.e., stains on the ceiling, especially in the cabover area. Look inside all the cabinets too, with a good flashlight. Check the entire floor area for soft spots. Check inside base cabinets, especially those with sinks for signs of rot, mildew, etc. Check all the exterior seams to see if any of them are open. Since you are new to RVs, you may want to consider hiring a mobile RV tech to look at the coach and tell you what needs attention. Spending a couple hundred to save making a $4,800 mistake might just be a good investment.