I only have about 4 portals, less than most of my friends.
I wish the portals would fuel closer to how beacons do, or even the spark generator setup where it consumes the material and keeps an internal balance. Let us build a month up if we have the resources rather than having all these portals that are on different timers needing to be refueled on their own schedule.
I have one big portal that leaves my little hub, and I keep forgetting that I need to refill it twice as often as all the little bitty 2 block ones. Keep shelling out the re-opening fee.