It all has to be an equation of: size of parts to be cleaned, hardness of
those parts, how clean they need to be, how much needs to be cleaned in a
batch, time allotted per cycle, and possibly other factors. Building one
huge mondo unit may take a lot more time, money, and upkeep than making
several smaller ones that may run a little longer, but would be cheaper to
replace balls, grit, and other consumables.

Steve