x2 on not having plumbing, electrical, or gas in the slide. I have had two motorhomes with the couch and dinette in the slide. Both were Hwh hydraulic powered slides. Both rvs were 2000s, and neither has had a single bit of trouble in 20 years. My previous rv was sold to a friend, so I still know whats happening with it. Resale value is better, and easier with a slide. My brother had a TT for sale a few years ago with no slide. Almost every caller asked if it had a slide. They weren't interested in one without one. Some people will say they wont buy one with one, but I think they are in the smallest minority. I prefer slides. They make the whole rv more useable and spacious.