Most businesses lose money for the first few years. You will have to have enough money to support the business and yourself for at least 5 years. Don't forget, this isn't just supplies and merchandise, you will need enough for rent, payroll, and taxes, among other things. You will also need to hire a lawyer and an accountant to help you jump through all the hoops. It's cheaper to hire them first, and get their advice, rather than mess up and have to pay huge fines after you run afoul of some law or tax regulation.