I worked for Winnebago for 15 years, two of them in owner relations and although there were unhappy customers, I believe that alot of the frustration was getting it fixed right the first...or fifth time! One reason you may hear more about issues with the 3 you mentioned is they sell more coaches individually than most of the other combined! At one time Fleetwood was #1 with more Bounder sales than any other RV manufacturer and now Winnebago is #1. Every RV manufacturer goes thru a rough spot some time in their history, and every one has a few "issue" coaches as well. And one thing you will find...EVERY coach will need service at some time I don't care who it is. There are over 3,000 components in an RV. Then you engineer a coach that uses fiberglass, aluminum, steel, wood, plastic, rubber, composite materials and manufacture a coach that sits on a dealer lot for months with temps at 20 degrees or less in the morning and 60+ in the afternoon. All those materials expand and contract differently and it's an engineering challenge/nightmare. Then we take that unit and run down the road 70+ mph, shove out the sides with slides, and wonder why we have to take it to the dealer. If you ever build a house, eventually you have to caulk the windows, replace some siding, reshingle, and patch drywall when it settles. And just like houses, some build them better than others. Which brings me to what I feel is the best advice when shopping for an RV...shop like you would when you look at a house. Look at the materials used in manufactureing, alot of mgf's use particle board and veneer, not a bad thing, just not upscale and sometimes not as durable. Here are some tips:
You have 2 children...where are they going to sleep? One bedroom means you have to fold down the couch or dinette, or both every night, this makes the living room useless after they go to bed. And it's not very comfortable. Maybe look at a class c, or a unit with side bunks?
What are you going to tow and carry? Find the posts about GVWR, CCC, GCWR etc. Some coaches have alot of carry capacity, some don't.
Dry camping??? Generator? Solar power? Inverter? Water/Sewage capacity?
Some things to look for in a used coach to avoid trouble:
Stains on the ceiling around AC, inside front cabinets, etc. look for roof leaks
Weight distribution...get it weighed and find the GVWR and GAWR, something too heavy in the front won't drive well and stop well.
Maintenance records.
Good Sam and I believe Camping World have a Certification Program that covers over 100 points that also may be a good idea to look at? Unless you are buying from a good dealer.