Hi David,
We did a tender at Wyong in 2015 (pre merger/Central Coast Council) and we were guided by our Procurement Team at the time. I think we had 3 or 4 tenderers then but we did have approximately 50000 meters to be read quarterly.
Sorry I can’t recall what we specified in the tender request (or access it now) but you should able to find something online or through LG Procurement.