Goldmine is a good place for carbide drill bits as well. They occasionally have box of 50 for $25 (usually $40). I've only broken 4 in the past 2 years, so figure I'm set for life...
We go through this topic almost monthly, search the forum first. Easier to find the best links, and read about personal experiences. The pulsar paper is really that easy to get good results. 10 sheets for $14.95 (8 1/2 x 11"), suggest you start with it, experiment with other papers if you are on a tight budget.
You'll need a chemical to etch the copper, searching the forum will bring up three common ones.