I have rearranged my game shelves to clear an entire shelf for this game. It is a sturdy shelf, so I think it can handle a 20 lb game without toppling.
Now my biggest challenge is to clear the schedule so I can actually play this game.
Speaking of weight... I would imagine the game gets lighter once you punch out the components and chuck the trimmings. Of course, my obsessive compulsive use of zip-loc bags for organization will probably put that weight right back into the box.