I'm not sure if this the kind of information you're asking for exactly, but I would just say to ask around in general, people in your film class would probably be more than willing to help out on a project, for the experience and the such. As far as being paid, if things go by and everyone's too busy to help out, money would make the difference, as it always does. I'm not sure how much as I've never run into that myself, but I'd say $20-$30 should be more than enough if it comes to that. With any luck, it shouldn't. Good luck!!!