If you want to do saw repair, chain sharpening, lawnmower blade sharpening, weed eater, blowers, whatever, you really need a separate location than your home because people will aggravate the piss out of you.
And, there is a psychological aspect that if you work from your home people do not expect to pay you what they will pay a business. Right or wrong.
If it is a business you need to post your hours and you had better be there the hours posted or you will soon be out of business.
We get $6 a chain off the saw and $9 if we take it off. Somebody is sharpening chains about 2 hours a day. Bring them in one day, ready by noon the next.
We (or they I should say) make $50,000 a year just making keys.
Lots of ways to make money.