At this point in life I have the tools and the knowledge, just not the desire to do that **** anymore. I still do my own work (mostly) but pay for it in aches and pains.
It's hard to let go not only the cash, but also the quality of the job. Too many times when I farm something out the quality of the job is not there when it's done.
I stopped doing oil changes a long time ago on the cars because it wasn't cost effective. Last one I got the guy left the old oil ring on the engine, and it started leaking after 1,000 miles while I was away from home. :S