Couple of other things come to mind, you're estimate does not have packaging in it, can't sell ammo in Canada in bags has to be boxed in trays. Also as .223 is the center of attention here, would have to say any machine that is sizing brass while loading would be way to slow, Scharch makes an auto reamer that would prep the brass and make the loading operation run much faster, also get rid of those pesky crimps in the primer pockets. Those crimps will crash an automatic machine or at very least flatten the primer out so you cant sell it.
Also the choke point for supplies would be primers with the US at war and every one else hoarding them you would be lucky get the operation of the ground. Even if you could buy them in bulk (millions) where would they be stored and how would you transport them. Powder could be bought by the drum bullets would be hard to get, perhaps you could set up to make bullets as well.,...