There is alot to it to have a "legit" shop. What experiance and certifications do you have? How many years of experiance do you have? How much capitol do you have on hand? To find a good location that is zoned for a automotive business can be very expensive. Plus besides insurance you will probably have to be bonded aswell. Insurance and bonding companys will ask these basic questions so if you have shity credit or none it all it could be a problem. Also your age can hurt you. I got a dealers licence at 25 and had to jump through hoops becase of it. Nonestly in this economy it might be best to just hang on to you're money and work a 9 to 5 to see how things are going to go. Becase it is stressful being the boss!