SBA 7 (a) loans. Of all the federally sponsored debt-financing programs, this is the most popular, and perhaps the best. It loosens the flow of credit by guaranteeing the lender against a portion of any loss incurred on the loan.
Leasing fixed assets conserves cash for working capital (to cover inventory), which is generally tougher to finance, especially for an unproven business. Warning: Don't put so much money down that you end up spending the same amount of cash as you would have had you bought the asset with a down payment.
The interest rate can vary based on the size of the loan, with smaller amounts costing a little more. Shop around. Some banks reap servicing fees and nice profits by selling the guaranteed portion of the loan to insurance companies and pension funds; in those cases, a lender may be willing to offer you a better rate.