10-20 years ago it would have been a good idea. These days it would be madness to even think you could make anything other than pocket money at it.
Few reasons for you..
FAR too many people doing it already..
Those that are.. kids.. unemployed, doing it for peanuts.
Computer use is declining in the home as more and more services move over to mobile devices/smart tv’s..
Insurance costs are astronomical these days (are you willing to take the risk of a computer being damaged whilst in your possession and you having to replace it?)
Laptop prices rendering some almost throw away items not worth repairing.
Most clientèle using you because then know you, and expecting a reduced fee/free service.
The list is endless. The idea madness.
Sorry 🙁