I made more money than I knew what to with in my early teens mowing yards in the early 80s. I mainly used the lawnmowers of the homes I was mowing to boot. Single mothers were a pushover, and once the houses with fathers saw me mowing, they were just too tempted by having me mow instead of themselves. In the summer, I was turning away business there was so much.
When I was a kid we discovered a graveyard of dead lawnmowers in the woods behind a golf driving range down the street.
By 13 I was a small engine master mechanic...
Miss those days...around 1980.