I was an accountant/tax preparer... I seen many sucesses and failures. Good bookkeeping, being consistent with putting money aside for taxes, licensing, fees, etc... and being able to save for the lean times all were the main reasons some businesses survived or went under.
Talking to an accountant the first time is usually free of charge. They can let you know what licenses you will need, what percentage of your sales will typically go to taxes and such, this is what we do day in and day out.
Then check with local women's business groups, see what the local pitfalls are in your area (and bonus's)
Too often people go into owning a small or large business without enough information and become easily overwhelmed. Few business start off being able to pay anyone a income, or liveable one.
Like what was previously said, be prepared to work some 16 hour days without days off for atleast the first year or so...
I wish you lots of luck on this venture!!! :D:D:D