That's what I've always said, how can you trust a "pro" to calibrate a set correctly, if you don't know what correct is. If you know what correct is, then it isn't much more work to learn to do it yourself. You can get a colormeter and software for $400.
Getting the black and white levels correct will get you to 80%, that can be done by eye (really those two things are the most important part in getting a quality picture with real depth). Color and tint gets you up to 90%, that just needs a blue filter. The last 10%, getting the color of white to 6500 K, and the gamma ramp smooth, are the hardest parts.
