Anything is doable and 50,000 can be accomplished but it all depends on how much work you get, your advertising and how good of work you get first. Go to a local college and take business classes. That is what I plan to do after I get my diploma in auto body and my associates degree in auto tech. I am going to do those two things first, then get my business classes done, etc take a few art classes (for the hell of it). Get ASE certified if you can because a lot of people like to see master techs and it gives the customer more confidence that you will get the job done and done right.