Too many replies to read them all. Here is my story:
I have owned in my 40 + years of camping. 1 truck camper used, don't remember the brand a Coleman tent trailer used, a Fleetwood Wilderness Travel trailer park model used a Fleetwood Wilderness 5th wheel full slide new and now in a 2014 Forestriver Sunseeker 3010DS Moterhome one model year old. Non of them are high enders. When I sold all of them they were in great working order and had quiet a few good years of service left in them.
Yes, you will have some, mostly miner quality issues with all of these, what I call weekender quality type units, but for the most part if make some mods and you keep up with all of the regular maintenance and repairs as needed they should last for a very long time relatively trouble free. This forum is a great resource for information and repair tips and as a lot of people mentioned a lot of us use it for problems we are having so sometimes we are a little frustrated. If you are not a little handy with some tools and if you think having to repair a minor issue on your rv fom time to time makes it a pos I suggest you rent a cabin or rv. and most of all