Similar to owning a house, you have to be willing to get down and dirty with your TT, understand the components, and try to fix at least some of the issues that may arise over the years. Remember that your TT will only be under warranty for a fairly short period of time, after which you are on your own. It will get mighty expensive to drop off the TT to a dealer every time there is a small problem. This is even more so if you buy a used TT to begin with. I can't count the number of minor repairs I've had to make over the last 20 years of RV'ing. If I took it to the dealer each time I'd be broke by now. ;)
Ironically, other than checking and adding fluid and changing bulbs, etc, on my cars, I'm not mechanically inclined enough to be able to do most repairs. I gave up doing oil changes many years ago because it just wasn't worth my time and effort.