Dave, the instructor plans on 3 hours per class but Ethan and I were done quicker than that. We were there 5 hours including a lunch break.
Our instructor said his first class was taught at Michael's. You might check with them. You might get lucky! Otherwise youtube, airbrush.com, theAirbrushForum.com all have video tutorials that show you everything we learned. Having someone there demoing and with all the "right" equipment was a big help. But you can get a really good airbrush for a really good deal (while helping the people of Christchurch, NZ) here:
http://www.tcgraphicsandpaint.com/airbrush-store/aa4nz.html. We bought the Badger Renegade. From researching it seems to be every bit as good as the Iwata HP+ guns we used at the class that cost $200 AND the badgers have a better warranty. Then buy some Golden pre-mixed paints: we used red opaque, blue opaque, white opaque (thinned 50%), Shading Grey, transparent yellow, and transparent purple. The instructor gets his paints from
http://www.dickblick.com/products/golden-airbrush-colors/. Unfortunately we learned about Golden after I had already ordered some Createx paints and they have turned out to be much harder to use. *sigh*
GK