Building bee houses can work for the hobbiest if they have the necessary space. It is pretty much out of the question for a commercial beekeeper who trucks his bees interstate for pollenation and honey production. Storing a hundred, let alone 1000, hives inside buildings is expensive and labor intensive.
With the bees hives from Carnica not all the frames from the super are removed at the same time for processing--usually only 2 to 5 from several hives at a time. Traditionally the honey was harvested in segments over the spring and summer and sold/traded locally.