I'm 15, I need money for Quake Con '08, How would I make it?

Hi, I'm 15, and I really want to go to Quake Con '08, easy enough but my computer isn't up to snuff so I need to build a new pc. So thats around 1.2k, then I need to pay for airfare and hotel, but my brother is going so just more importantly, some of the travel expenses and travel money. My goal is around 1.5-2k by July. How can I make it, over here people don't look at anyone under 16 for a job, so how can I make that money?