My DJ/DS is coming in at 27, buts its a SS. What kind of jumping are you talking about? Dirt, urban, freeride? All of those take a beating, so heavier is the norm if you don't wanna spend a fortune. If its light stuff, a AM rig would be okay, and at around 35lbs, climbing will be okay, depending on how steep it is. If weight concerns you, and you are on a budget, look into a hard tail. A light dually is gonna be far from "budget." Cheap full squish is gonna be hella heavy.

What bike are you looking at?