I had cockroaches. They were all supposed to be male but one or more started laying eggs. I noped right out of that one.
I had a black Emperor Scorpion. He was a chill little dude. Mildly venomous. Fine pet for someone who can handle that / not young kids.
Depends on the job, special tools and workspace needed, and time.
I recently had a mechanic replace a wheel hub assembly for me. He sourced the parts, finding them for about 5% cheaper than I could find them. His labor rates were very reasonable. And I don't have a lot of time for that sort of job, nor space to do it efficiently where I currently live. Could I have done it? Yes. But he got it done in 3 hours where it would have taken me the better part of the weekend.