Don't do it for friends or family, when someone asks you if you know anything about computers tell them 'no, I don't even like using one'. You'll end up fixing stuff for free, and god forbid you build a computer for them they'll talk sh*t behind your back on how you screwed them while you take a loss on their computer(it happened to me). Now I don't even build computers for my parents. I had to just tell people "no I'm not going to" and look like a pr*ck. At least that way I only look like one once, instead of each time some B-hole tells a story about how I robbed him.
If you going to build computers for people then understand your always going to be undersold, so you'll have to find people who want service that big companies are unwilling or unable to supply. If your just going to service them then the good jobs will be people just wanting an upgrade. Bad jobs will be the moron that tried to upgrade his own computer and failed, not only that but they'll most likely won't tell you that they did whatever to break it. As harper said there are better ways to make money.
If you going to build computers for people then understand your always going to be undersold, so you'll have to find people who want service that big companies are unwilling or unable to supply. If your just going to service them then the good jobs will be people just wanting an upgrade. Bad jobs will be the moron that tried to upgrade his own computer and failed, not only that but they'll most likely won't tell you that they did whatever to break it. As harper said there are better ways to make money.