Hi John,
From my limited understanding,
the answer to your question depends on how much forage your particular landscape provides. There is a carrying capacity for pollinators that gather nectar for food surplus.
For example; My area will support about 2 langstroth hives (A large bottom and two medium supers,that will gather from an area of approximately 5km in radius. That happens to be a very low carrying capacity, mostly due to long winters and subsequent need to build up large
honey surpluses for winter food.
If you are in an area that has uninterrupted nectar flows from Spring until early Fall, you could support much larger colonies. Or more individual hives.
I personaly stick with just two, If I have a bad winter kill, or a surprise swarming, I still have the other hive as a back up and aid to repopulation.
You may want to go with three, if you think the
land will support it, just for additional insurance. You can always add more supers if the hive wants to expand upward.