Yo Jaeden. Here's my .02 worth. You are making a classic drum mic mistake, being the idea that large numbers of cheap mics will sound better than small numbers of good mics. In your price range, you will get better sound with 4 good mics than 6 or 8 bad ones. You already have a 57, so snare is covered. What you need is a good kick drum mic and 2 overheads. That's *all* you need.
Of course, your best bet would be to snipe this stuff on ebay, but I'm only going to list equipment with online availability and new prices. I'm using 8thstreet.com prices, but you might do a little better if you look around. The cheapest kick mic that works seems to be AT PRO25, $69.95. Better choices would be ATM25, $139.00, AKG D112 or
Audix D-6, $199.00. For overheads, it's really hard to beal Marshall Electronics MXL 603s for the price, $72.95 each. For $199.95, you can have the matched pair with the airline case and the shockmounts. Probably in your price range, I'd go for the ATM25 and 603's, or AT Pro25 and the matched pair of 603's. As I said above, I would probably be hunting them down on ebay, rather than paying full price. I believe that those 3 mics, plus your 57, will render better sound than any drum mic kit under $300. Just get 3 good mics.-Richie