As others have said, running a record label (in this day and age) is a labor of love. You do it because you love the music, you love the artists and you love the scene. I am friends with a few label owners and it's an absolute treat when their release breaks even. I don't think a whole lot more needs to be said really. You are approaching this with entirely the wrong motivations here. Start with a passion in music and the desire to give your friends band a platform to try and scrape together a barely sustainable living, or even just get their songs pressed on a physical medium. At least that will be spiritually profitable.