Thanks for the update. Glad they got what they needed. Interesting legal question as to whether the county can contract away its obligations to provide emergency services. (And one that I don't know the answer to.)
No, they cannot "contract away" their obligations. For example, the provision of 911 services is a federal mandate.
The real issue is that the county didn't want us to build there but had no legal basis to deny the house numbers. If the local voters had not had the foresight to deny the county commission zoning authority, they would simply had zoned this land as non-residential and we not be allowed to build on our property.