Just got back from the Nats to read this very good news!! I agree with all of the above suggestions about insurance and documentation, but by far the most promising idea invented by yourself so far is your niche market! It is an absolute great idea to create a business based on catering to the ladies, by a lady! IMO, your business will boom for the simple fact that I think you are highly qualified and capable, and by taking advantage of the fact that ladies do get taken by the male dominated repair industry, this is a great selling point to your business!! You really need to expound upon this by advertising the fact that you are a female yourself, and couple that with what will be your growing word of mouth clientele, I can see this really taking off!!
I know you're gonna do your best and give this venture every chance to succeed, I just wish you were around here, I would use you without question! You are one heck of a good mechanic, and many other aspects of the automotive industry for sure!! Good luck young lady, I'm very proud of you!! Geof