I have room (and personal ability) to expand by one hive to five. Last year was my first year to overwinter hives - so, IMHO, I now claim beekeeper status. Did not feel I could do that until I overwintered successfully. All three of my hives survived. Split to four last Spring.
So, current status is four hives, with one in a single deep. Resolution is to solidify beekeeper status by babying these bees through this winter and splitting to five hives this Spring.