I would recommend a Keystone Bullet 285RLS Ultralight TT for a retired couple. We bought a new 2014 last year! Love the floor plan for just a couple and a pet or 2.. It has the benefits of an Ultralight, but is luxurious inside with a 3 ft deep slideout that is 11 ft long, sofa, dinette and 2 big rocker recliners in the rear living space.. We also like the angled hallway /bathroom that hides the queen sized bedroom. It is 30 ft long but weighs only 5500 lbs. We have used it twice this year for 10 nights and not a single thing that didn't work! Check it out on line.. and a very good price as well!