Think of it like a job that you get paid for doing. The more work you put in, the more you can make. But even if you get a great property in a great area with best friend tenants and they promise to take care of it, it will still be work.
The best thing to figure out, is how upset would you be if you had awesome weekend plans, and your tenant called you Friday night saying the hot water's out, and you have to cancel your weekend to deal with it. Would you freak out, play it cool, want to fix it yourself, have a handyman come, hire a plumber?