We purchased 3 travel trailers over the years and all 3 of them were great. Very few problems, and almost everything I could handle myself. Fast forward to last September when we purchased our first 5er at 41 feet long. Ever since, it seems it's been a constant fix-er-up-er project. Nothing extremely major, but one small thing after another has needed repair, and thank goodness I have been able to handle almost all of it myself.
We are soon coming up on 1 year of ownership, and I can't imagine anything else falling apart. What was rebuilt or repaired is now rock-solid and will last forever, as I did the work myself.
But, the closer I examined the failures in this camper, the more I realize how the manufacturer cut corners, where just a 1/4 inch of something longer would have made all the difference in the world.
So, hopefully, I am now past flushing out the little fixes and unexpected things and have a solid camper finally. No granted, some things happened at my own fault, like clipping the back end of the camper when making a turn somewhere and it got too close and clipped the trim loose. Fortunate, it was easy to fix, but does have a small dent now. The learning curve for this 5er has been slow and anguishing, but I'm finally getting there.
Why am I telling you all this? For this reason. We purchased this 5er will full intent of going full time 2 years after we purchased it. So far, it's taken a year of week-end camping, sleeping in it every night since we bought it, and lots of week long trips all over the place East of the Mississippi. And I am still learning and flushing out fixes and changes.
In other words, you REALLY need to own the camper a good year before hitting the road permanently for all these reasons. That year will flush out defect issues. It will give you a year to really know your rig, it's limitations, it's strengths and weaknesses. By aggressively traveling over that year and having a home to come back to, will provide a place to do those fixes and changes to make your rig more comfortable and road-worthy for longevity.
Over that first year, you'll learn a lot, especially if you camp as much as you can and make an effort to "experiment" with all kinds of camping styles: State, Federal, National Parks, Private campgrounds, boondock, WalMart overnighting style, full hook-up sites, and minimum hook-up sites.
If you plan on getting solar on your camper, you'll want to thoroughly test it out before having to depend upon it and find out it's got shortcomings (not as much power generated as you'd expected, or need to add more batteries, or more solar panels.) The year gives you an opportunity to flush all this out.
I'm expecting our current 5er to last at least 15-20 years. And this is the last camper I'm purchasing.
You have much to think about, but with good planning and preparation, you'll do just fine.