Regarding the number of workers, one hand could mean one employed/paid person in addition to the owner. Also the owners family (sons) would probably work at the place in some capacity and they might not have counted. I don't know if they would have counted slaves or indentured servants.
Did the census list farmers as a separate category?
Does the "How much grain is consumed" question refer to how much per run or what? We need to work on our math here (I know there is some
aversion to numbers here that don't correspond to the proof values for whiskey).
But Mr Hebderson, if you get 2 gallons per bushel, and used 150 bushels, that means 300 gallons of whiskey. If it's only worth 50 cent a gallon, you only should get $150, not $300.