Earlier quoted context omitted.
No better feeling though! Especially when running the numbers post-fix (insert CS joke here) and comparing to shop quotes. I keep spreadsheets for two cars and an older jet ski and I've saved ~$12k this year alone by wrenching solo assuming $100/hr = standard labor rate. I've learned a TON of cross-functional skills, have full control over the parts and repair, and it's just a feel-good way to step away from my desk…
You'll probably be less time efficient than a full-time mechanic though.
Of course a professional will accomplish tasks faster than a DIY'er checking YouTube.
But, as OP says, there's savings AND personal satisfaction involved. Why is time-efficiency the metric you're weighting in value?