Running above 65 mph is more than a tire issue. It's a control and braking issue. If some idiot pulls out in front of you, will you be able to stop?I'd rather arrive 30 minutes later safe than the alternative.
I've had many blowouts, and I take all the precautions. Run below 65mph, check pressure before moving the TT, and check the tires carefully before each trip. Trailer tires are going to fail. On all my blowouts, it certainly looked like they failed...
You could do it cheaper by just getting the plastic wrap from Lowe's that you put on the inside and shrink tight with a blow dryer. It's meant to keep out drafts. That might help. I bet the windows are really expensive. Anything RV is outrageousl...
You'll have a pull handle for each tank. My old unit had three tanks. There were three pulls. I painted the gray ones with silver spray paint so I would know they were gray water. There's nothing like accidentally dumping sewage when you thought ...