Ah, the Trek, not the Road Trek. My misunderstanding. I always liked the premise of the Trek by Safari (later owned by Monaco): with the bed that came down from the ceiling. Back in the 90s, we used to see a lot of those on the road. As slide-outs on motorhomes became more prevalent, it was easier for designers to get comfort in shorter lengths, so the Trek kinda lost its niche.
Safari (before being bought by Monaco) motorhomes were unique in their heyday: aluminum sided (as opposed to fiberglass) with very practical floorplans; quality without the bling. Matt Perlot, the guy who started Safari, used to say their motorhomes were designed on the outside for men, and the inside for women.
Once purchased by Monaco, the Treks and Safaris became fiberglass-sided and similar to the other products produced by Monaco (Monaco, Holiday Rambler, Beaver, Safari, McKenzie 5th wheels). Still well-built, just not much to differentiate them from the other lines.
As far as retirement plans, the RV parks where we have been staying are full of people from the northern states who migrate south to get away from the cold. Like boating, it is an interesting, active lifestyle. It is easy to get used to the amenities in an RV... only have to pack once, and you always have your bed, your kitchen, your bathroom, and your amenities with you.
The differences between the different types of RVs are like deciding which boat to buy (sailboat, trawler, trailerable, go-fast, houseboat). Just like buying a boat, you have to decide what mode fits your needs... travel trailers are an inexpensive way to get into the lifestyle, if you have enough vehicle to comfortably pull it. 5th wheels have great liveability and more storage; you really have to match up the right truck for the job. Motorhomes offer great convenience, but you have to consider a big motor and chassis that will generally sit more than it will roll... diesel vs gas... and just like with boats, that choice will depend on size and use.
Good luck with the search, Harvey.
Best wishes,
Jim