Given any specific number and position of gateways, how do you calculate the operations cost?
Given any specific number of gateways, how do you optimize the operations cost? Including the possibility of extending the range for some of the gateways?
If you know the minimum operations cost for a particular number of gateways, N, then under what conditions is it possible to lower the cost by adding one more gateway?
If you know the minimum operations cost for N gateways, and the minimum operations cost for N+1 gateways is higher, under what circumstances is it possible for using more than N+1 gateways could lower the operations cost below what you can get with N gateways?
If you try with one gateway and find a cost, and then try with two gateways and find a cost, and so on increasing the number of gateways by one each time, is there ever a point at which you can stop adding gateways knowing that adding more gateways could not possibly reduce the cost?