It's my opinion that the "cosmetic" stuff is a rip-off! You could (and should) wax your rig on a regular basis, anyway. As others have said, if your family is messy, you can pick up a few cans of "Scotch-Guard" and spray the upholstery and carpeting yourself for 1/10th the cost. As for the extended warranty, it's the biggest rip-off of all! They are huge
money-makers for the dealership! If they weren't, the dealers wouldn't push them so hard! Your Jayco comes with a 2 year bumper-to-bumper warranty, and most of the costly components carry manufacturers' warranties that are even longer. And you should carry insurance on your trailer that will cover just about everything else. That means you're already covered for 99% of the things that might
go wrong with your rig. Put a few bucks in a savings account every month, and in no time at all, you'll have enough put aside to cover any other needed repairs.
The hitch, on the other hand, is a different matter. Your dealer's hitch tech is familiar with your rig and their hitches, so he/she can select the one that best matches your needs. Because they've set them up on virtually every TV on the road, they have the tools and experience to do the job in no time at all. And if your set-up needs a little "tweeking" after your trailer/TV is loaded up for camping, most dealers will make those adjustments at no charge. There's no way my knowledge, experience, or tool stock could match the dealer's, so I had them install and set up my WD hitch & sway control. I'm glad I did, and (unless you're a hitch installation expert) would recommend you do the same.