I think you just have to know someone. I tune all of my friends skis, along with my family's. I charge my family nothing, allthough my brother is good at mounting antlers so he will be doing my 8 pointer for no charge this year. My friends pay me $10 for a full tune. I take a swix file to the edges (only if they are REALLY bad), .5 degree base and 2 degree edge bevels, and then use the moonstone, 200 and 600 grit for case hardening. Polish them a little bit more with an Arkansas stone. Then i use a brass brush to clean the base, maybe even a nylon brush. Might do some hot scrapping with a parafin wax. Then i lay on some Hertel Hot Sauce all temp wax and move to the other. When im done w/the second ski, i go back to the first. I scrape it, then use the brass brush agian. Then take the nylon brush to the base. After all that, i have usually spent an hour or so. ALso, with my friends, the $10 is more than enough to pay for the supplies, some money in my pocket, and I always have a full, cold, free beer sitting at the end of my tuning bench.
What more could a college kid need. Besides, if i took all their money then they wouldnt have any for lift tickets and id have to ski by myself.