What is a good change of career in computer repair?

What industry is difficult to do, I also want to change career to do computer repair it. What work is difficult ah. Or consider what industry they have the opportunity to start it. I engage in printing production, this line of investment is too big to do it yourself, it's okay, no funds for life can not do printing. Computer repair as long as the technology is good. It is not difficult to start. This side now opened a lot of chain computer repair store it. Or their own industry to think about it!