Are there any available entreprenurial grants for veterans that will cover initial startup costs? We would need somewhere in the range of $10,000 to $20,000 if possible but any amount would help?

What percentage of service connected would you have to be to get a grant to cover start-up costs?

Typically not unless your Service Disabled. With your credit rating you should be able to arrange a bank loan for $10-15k. If you can't get a local bank to do it, let me know and I'll refer you to someone who might do it.