Hello MA,
If I had a new Capri this is what I would do. My Used Capri had bare plywood for floor and the sides of the box. I Assume the new ones are the same. I would thoroughly water proof all the bare plywood inside and out. I would not trust any of the sealant used on windows, doors or exterior moldings if it is the tape type caulk. The most common source of leaks are around the moldings, windows and doors. Yes, what I'm saying is I would remove tall the above and bed them back in place with a good polymer caulk like Dap Sidewinder. Do not use a latex based caulk as it will wash out. I would also fill any screw holes. If you have the type of molding that has the vinyl strip in it to cover the screws, the strip is not water proof. Water gets trapped in that space and in time will work it's way down the screw holes and into the wood. The roof is next. Check any thing coming through the roof. If they have used the self leveling type caulk, that is pretty good stuff. But inspect it all to make sure every edge is well sealed and inspect it often. If you have a roof air conditioner, I would remove the inside trim so you can see up where the seal is. Have someone use a hose on high pressure on the roof around the base and look for leaks inside. Depending on the roof framing, the AC can cause the roof to sage with time and water will pool around the AC. I would inspect the AC bolts that hold the unit to the roof periotticly to be sure they have the right torque to keep the seal compressed. Roof AC's are the fist thing I get rid of and install window type in the wall.I would also caulk the inside of the box where the walls meet the floor. Caulk any place water could get to wood. Paranoid, nah. Bought a use TT 7 years old. It was headed for salvage because of water damaged. My used Capri was 6 years old and rotted way beyond repair. As an example I was able to pull the all screws holding the jacks on out with a pair of pliers. Hope this is not over whelming, just trying to honestly answer your question. Good luck, Tom.