I have an '03 Fleetwood Elkhorn 11J. This is the last year they made TCs. It has been an excellent camper for me. There is no factory support. I emailed them recently to ask where the wires were in my unit for the solar pre-wire. There response was basically "we don't make truck campers anymore."
I bought my camper in 2009 for $9,500. It was 6 years old at the time and in excellent condition. It is fully loaded with AC, gen, 2 awnings, microwave, remote jacks, dry bath, side entry, etc. The unit you are looking at is over twice as old and not as big. It think that price is rather high.
Mine had some rot at the door sill and some across the front at the bottom. Neither place was that bad and I fixed them myself in my garage.
The Fleetwood is not a high end unit. It has cheap plastic trim and the hinges on the cabinets are kind of weak. But, we have 2 small boys and a dog so we're kind of hard on things. I'm quite happy with my purchase.
As for the cabover overhang, there's not problem. A crew cab pick-up doesn't offer any additional support. It's still the same length piece of camper sticking out there. I carried mine on a reg. cab for a while. It made a nice sun visor and helped keep the rain off the windshield at low speeds. The only real issue was the radio antenna scrapped the bottom of the overhang.
The microwave in that unit is a Samsung I believe, like mine. They had a problem with turning themselves on. Samsung issued a recall. Long-story-short, I cut the cord off the microwave, took a picture, sent it to Samsung with the model number, and they sent me a check for $200.