I see you are from Charlottesville, I'm in the Farmville Area. Richmond Camera will stop processing film this summer. I think Pro Camera sends all their stuff to them, so it might be a great opportunity.
I'd say with all buisness decisions, you need to ensure that you have time to deliver what your promise. As for pricing, I think it depends on the client and their purpose - especially if it's your look that gives them an ace in the hole.
I don't think you're ready for marketing, get a few clients under your belt, see how you like the work and most importantly, make sure it's something you really want to do.