If you live in Texas (I wasn't sure since your city is listed as Asheville, NC) you can take a cash-out refinance on your home, and you can borrow up to 80% of the appraised value of the home. A Home Equity loan may work also depending on the amount of cash desired.
No matter what state you live in I advise to tread carefully. You have a home free and clear which can make the long term future much easier. I would hope that you have already written a business plan and presented to your bank or even investors before betting your home on a start up business.
I hope whatever you decide works out for you.
Mortgage Counselor - NMLS 280951