Until recently, my main concern with my future photography career has been the technical issues/composition ect. of my photos. Now that I am a junior in high school getting closer to graduating and making it my career, I have began to ponder more about the business and money making part of my photography future. I have been trying my best to understand some of the procedures of getting your photos sold but there are still some unclear areas so forgive me if this is a dumb question. I ran across a thread just now that was talking about printing your photos on the spot of an event and selling them before it is over. (I didn't want to barge in on that thread with this long question) How do you go about doing this? I have seen the printers they use at Wal-Mart and they are huge. Do you load your photos to a computer and just use a very high quality printer you have on hand hooked up to your computer. (I don't know much about the self printing process, I get all of mine done at Wal-Mart). How do you get all of this printing and stuff done in a short amount of time on the spot in order to sell the actual prints right then. Sorry this is a long post but I would really appreciate if someone could help me with this.