You have two choices for retiring from life as a professional DJ: die young or do something else. Or practice, practice, practice, work day and night, weekends and holidays. Big name DJ's are multi-millionaires. Do what they did, only better. And pick a cool name before you end up as DJ Spinster or MC Shuffles.
You'll need a business name if you're going to be a professional event DJ, but if you're going the club route, make a name for yourself. The world’s top DJ's are known by their real names, like David Guetta, Armin Van Buuren and Tijs Verwest aka Tiësto, but you'll be a lot more notorious with a name like Deadmau5, Avicii or Daft Punk.