Ryan,
You lift your honey supers up on a converyor, or forklift, or anything, you then "extract upstairs" and if you taking a lot honey, you generate huge amounts at the bottom of the extractor. You then need to get it from bottom of the extractor down through a series of filters into storage (normally thse large "oil" drum sized honey drums) which are themselves quite high up. thus it is much easier if you start the process high up, and use gravity, otherwise you end up with needing a load of honey pumps.
Adam