We had a 2402D for 10n years. It went everywhere with us.
You mention a leak around the AC. We had to have our entire roof replaced by Josh at https://hilotrailerparts.webs.com/
. Suggest you call him - very knowledgeable.
Also, the telescoping pipe in the corner of the bathroom to vent the blackwater tank---it didn't
telescope well, and the top bracket broke, allowing smell to enter the trailer. I installed a rummer connector at the top held by screw-clamps, which allowed it the flrex to move as it telescoped. Was still working well after 10 years. If youm want to talk further, contact me off-list. Les