I always do some prep, so if you were to add up all the time it would probably be around 6 hours. That takes into account my recipe formulation, buying my ingredients, making a starter, and generally getting the equipment out and ready. On brew day from moment I touch the first pot for cleaning to the moment I've cleaned everything is on average 4 hours (almost to the minute). I've refined my process pretty well so that while I'm cleaning I have the strike water heating, while I'm mashing I'm cleaning for the next step, etc.