I would do a leak test on the unit. Not good that it has all the original caulking. I had a leak test done on my 2012 and found several areas on the sides that leaked. Caught it, corrected it, alls good!
Same with my 2008 but it was just visual. Windows are the biggest leak problems along with the corners.
Caulking is the biggest issue a trailer can have. I've seen a left over model on the dealers lot leak because they didn't check it while it had been sitting for a few years.
Sounds like a nice camper, good luck with it.
There's owners here who have that model. Do a search, find out who they are, and then private message them. You should get your answers.
2019 Ford F150 XLT Sport, CC, 4WD, 145" WB, 3.5L Ecoboost, 10 speed, 3.55 9.75" Locking Axle, Max Tow, 1831# Payload, 10700# Tow Rating, pulling a
2020 Rockwood Premier 2716g, with a 14' box.
Previous 2012 Jayco Jay Flight 26BH.