As a homebrewer I think this would be a pretty rough way to try and scale. The actual brew time would be the same, but you've increased your cleaning and maintenance significantly, you need a solution to pipe from multiple stations into fermenting vessels, you need a significant amount of extra space dedicated to brewing that could otherwise be used for fermentation vessels, etc.

I think the right answer is to get your equipment and do test batches to rework your recipes at scale. If you're successful as a brewery it's a process you'll have to do multiple times as you grow anyways, so avoiding it once seems like a silly optimization.