Hi, and welcome to the forums.For our metrically-challenged friends, you are looking for a motor home less than 7700 pounds in weight. You might find an Argosy 20 motorhome in that weight range, but most everything else will be at or over it. A small diesel motorhome would be an Airstream 280, but two problems arise with that. First, it will probably be too new, and second, it will be too heavy.
Can you tow a trailer? Maybe an Argosy 20 trailer, or Globetrotter, would be better choices. The Argosy weighs in at 2880 pounds, and I think the AZirstream is around 3200 pounds.