G-trust me, I can relate! It's getting easier for me to assign dollar values (relating to auto repairs) to my time. So far, only 2 kids are old enough to require us to drive all over the state. It's only a matter of time before the other two join them. I'm far from a mechanic but I enjoy tinkering with all of my cars. However if it's not a project I can get done in a half-day on the weekend it's gotta go to the mechanic.
But all you need to do is look at the lines at the quickie lube places to see how little most people will do. And I'll admit to having to resort to using my local mechanic for a simple oil change on occasion