Are there any resources out there for women starting a business where NO down payment is required?

I have searched and talked with so many different organizations about getting a business loan including SBA, commercial banks, and state funded organizations set up for funding small business owners. I have the business plan, the statistics for future sales and I have the collateral. What I don't have is money for a down payment even if it's only 10%. My other questions is regarding real estate. Do you need a down payment if you are buying a business already set up? Thanks in advance for any advice and/or encouragement.