Please make sure that you have a legal rental. Most short-term rentals in Greenville are confined to the Commercial zone, and there is a zoning effort happening right now to restrict short-term rentals even more.
If it is legal, you also need to be collecting more in taxes. If you turn on Professional Hosting Tools, it will enable a field in which to add the local 3% tax, in addition to the 7% state tax that Airbnb is already remitting.