There are numerous descriptions for full time RVing. Probably the only thing we had in common with your description is; living full time in a 5th wheel trailer.
Our 5iver is a 38' Everest with three slides. It has all season insulation. By no standards is it suitable for long term sleet, snow or freezing weather. We never really tested it. We were very seasonal travelers. North in the summer and south in the winter. In our first 4 & 1/2 years we put 75,000 miles on the 5iver and nearly double that on the dually. With all those miles we didn't have any serious problems. In fact, the "E" still has it's original axles after 15 years. Of course we don't boondock or deliberately drive down dirt roads.
One time during our travels we were visiting friends in Peoria, IL and found a nice mobile home park where we stayed for a couple of weeks. Unlike most RV parks it had individual lot mail service. Nice sized lots and a wonderful community center with game rooms and really nice washing, drying, folding room. Here is a picture. The Pride belonged to our traveling companions. A year later it was completely destroyed by fire in CA.
www.irv2.com/photopost/showfull.php?photo=12514
One time we parked at a RV park at Waldo, FL. They had a number of seasonal sites. Here is a picture of how one was set-up.
http://www.irv2.com/photopost/showfull.php?photo=29574
IMO those slide toppers are necessary for long term parking. So is solid sewer connections vice the flexible hook-ups.
It's important to remember, the "vehicle" part of RV. Unforeseen things are going to become damaged by the lack of cycles. Slide seals and tires will probably have a much shorter life expectancy than expected.