My dad had me doing oil changes on our cars when I was a kid, and I kept doing it after I grew up to save a few bucks. Trouble is I'm too darn fat to crawl under cars any more.
The only way I work on cars and trucks now days is when there is no immanent necessity to do it right away. The older I get the less I like doing repair work. BTW my first vehicle was a ford F100 with a 223 cu in 6 cylinder engine; you could climb in the between the inner fender and the engine!
Last weekend I changed an alternator pulley on our 03 VW Jetta TDI (diesel). It was so tight that I could barely get my hand in to loosen the pulley with the special tool. I hate it when there is so little room that you can see it and not touch it OR, you can touch it, but not see it at the same time!