I need some advice on equipment to buy. I am trying to turn my hobby into a very small business operation. Right now, I plan to buy a Rebel XTi with 18 to 55mm lens, and a close up lens filter. I know that it isn't a lot, but I don't have much money budgeted for this. I plan to buy a 1550 light kit later on, a couple filters, and two more lenses. Should I get the kit lens, or just spend a little more and buy a better one? If so, what lens would you suggest? I will mainly use this camera for on location portrait pictures at schools and nature shots. Thanks.