It is shockingly easy to learn how to wax your own board and do some tuning (edge sharpening, small base fixes). I paid a shop to wax my board a grand total of one time, and every wax job I've done myself has been better than the POS machine job. Buy the nice Dakine kit and a cake of whatever all-temp wax and you're good to go. The kit has a bar of wax in it, and it's good for the first time you do it and for summer waxing, but I like Bluebird or One Ball Jay 4WD better for real waxing.
I think Snowolf put a 3 part tutorial on Youtube about how to wax/tune.