I worked as a make-up artist at Glamour Shots. They hired me b/c of my portforlio with MK (the before and after shots) because I always did their make-up myself, which you aren't suposed to do, but I wanted them to look good! Anyway, that lead to me doing make-up for a couple of weddings, and several proms. Mostly people from GS that asked for my number for future events. I am actually doing my BF's make-up this weekend for her wedding. But I never did it as a business, just as "fun" and made some cash on she side, you know? I didn't have a price, I took "donations" and got about 150-200 for weddings (seriously, that's what they gave me) and 50ish for proms. I saw it as a way to build my portforlio. I used mostly MK, since I was selling it at the time, and I wouldn't have minded if they wanted to buy what I used on them. But if you are trying to go pro, the best line for that is MAC. They have a lot of pro products. The foundations are hard, because some people really can't handle MAC base (like me) but it looks great on film. The main thing is finding products that YOU like to work with, like Mascara's that will stay where you put them, and not clump, you know? Even if you have 10 things from 10 different brands.
And Ginger is right. If you are going to make it a business, check into the legal. I just had fun and took the $ they gave me