Not sure if you live in a populated area, Raggie, but coming from a teacher/tech's point of view, I'd suggest two things if you're pretty good with computers.
Most people don't know jack about their computers, especially if something goes wrong. You can give computer lessons, and make more $/hr than I do teaching guitar. Then, whatever people can't do in terms of repair, YOU can do! Again, for more money per hour than I make.
That's what I'm about to start doing, and if the population near you is fairly dense, you could get business within walking or biking distance. And if you do, don't go too cheap in order to try and get business. In the services field, people get suspicious if you charge too little.