I wish you the best of luck. There is nothing more satisfying than starting and becoming sucessful in your own business. Having opened a few sucessfully, I can offer you this advice. The 3 top items are Location
You will need traffic, need to be seen. Also in an area with consumers of your product. Also as JG mentioned your competion or lack of. Quality
In Product and SERVICE ... It reflects your love of your work. Word of mouth is your Best/Worst form of advertisement. Attitude
Honesty and Atmosphere.. Simply put ..great location with quality work in a dump run by a grump will fail.
Always watch your bottom line. Your business needs to pay for all business-expenses and living expenses. Remember there are other considerations.. Accounting,IRS, Rent/buy.. payroll
You can do this if you stay focused. Here's a link with some further helpful info. US Small Business Administration