Airbnb in Buncombe County NC

Does anyone know if permits or licensing are required by Buncombe County for Airbnb and other short-term vacation rentals?  Is a business license required?  I called the permit office and the girl I talked with wasn't aware of any required permits.  I know that the city of Asheville requires a permit, but my property is outside of the city limits.

Thanks in advance for the help!