Since you're on HN, I assume you already have a good computer. Invest the money in books that will teach you how to start a profitable and sustainable business, and purchase any additional tools you need to start producing and shipping. (Here are the books I recommend: http://personalmba.com/best-business-books/ ) I've easily spend $10k in books (and $20k+ in training) over the past ten years, and can't think of any…
If you own a laptop and can use your schools internet - start learning.
And stop spending your money. Go freeze your credit card in a block of ice or something.