Glad to have you here on iRV2. As on any RV that is 13 years old, a major concern is water leaks and rot. The wood frames are no more or less prone to leaks.
Check the roof over really well and look for any signs of water stains on the interior. Look at cabinets, behind cabinets, inside lockers and along the roof to wall seams. Also check the floor for any soft spots, especially around the edge. Also check the roof for soft spots. A soft spot usually means problems. Also look for any signs of the wall covering bubbling up. Also check the the exterior walls fro any bubbles and soft spots which are generally delamination. Most delamination is caused by water intrusion.
Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot