When addressing the city council, the most important counterargument to address would be:
Keeping the park open longer would cost the city more money and funds might need to be taken from elsewhere to pay for it.
This counterargument is crucial because it directly pertains to budgetary concerns and resource allocation, which are primary considerations for city council members when making decisions. By addressing this point, you can provide solutions or alternatives, such as potential funding sources, community sponsorship, or volunteer efforts, which could alleviate financial concerns while still allowing for extended park hours.