I did that from 2002 until now, though I'm shutting down. It was a decent source of income, I could've made WAY more and probably made a good living, but I never charged people enough because many of them couldn't afford to go anywhere else. It was a great hobby and it got me my current day job. It was interesting work, but the internet has become too dangerous, it's impossible for one person to keep up with all the attacks.