So it looks like you'll want 4 broodstock tanks. You can probably house them in 10 gallon tanks if they're hooked up to a main filtration system. That's 4x (20"x10"), and since they're 2 feet wide, that means they're going to occupy around 40" of space if you position them so that you're facing the narrow end. But let's be safe and say they take up 44 inches of space, since they'll also need to account for the rims of the tanks as well.
Next is fry: what are you planning on raising them in? Kreisels? Black Round Tubs?
For Growout: how long does it take for clownfish fry to reach a sellable size and color?
You'll also need to take into account a central filtration system, or if you want to filter everything tank by tank. Do you already have a rotifer/brine shrimp/phytoplankton station?