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Andrew as you have no floor space for a crane think about an overhead beam with a beam trolly or a swing out arm for a "barrow hoist" located near the lathe and one gor the mill. I assume you have a bit of wall or ceiling space but that could be wishful thinking on my part
A disadvantage of the method is that the mill table and knee need to be raised and lowered, by hand, to cut each tooth. I found I could do about a third of a gear at a time before needing tea. It keeps yer fit if nothing else.
Oh goody, saw you article in M.E.(well I think it was yours) on making these, now will have to digest this.