If the tower provides that much gold/gems all that would happen is the worlds economy on those things would collapse. It wouldn't make the tower tickets really expensive. This is some bad world setup so far. Also I hate series when they start a series off showing something later in the story, it's both always too spoilery and also jarring that your then thrown into the prologue. If the start is too boring you have to put that there then do less of the prologue.