I don't like paying someone $75-90/hour to take their time and most likely get it wrong.

I took a vehicle to a dealer once. CEL was on, paid them $500 for various things, didn't even get off the lot before the light came on again and they wanted to charge me more money to try new things to fix the problem...paying someone to guess what's wrong with a vehicle is not my idea of how i'd like to spend my money