You could charge $50/hr and youd be quite a bit cheaper than the saw/lawnmower shop. On top of that, if you didnt stand and smoke cigarettes while you worked on them, your customers would be getting a heck of a deal. I figure cigarette smoking takes up at least 25% of the average saw mechanics time(from my past observations, if youre a saw mechanic and you dont smoke, calm down, im not talking about you.) At $80/hr or more labor at most places youre paying some fellow $20/hr to smoke cigarettes.. nevertheless, you could make some pretty good money and everybody would be getting a good deal. Everybody wins.