well this thread seems to have been necroed repeatedly, but the OP stating 7 days of constant production for this, which is what a couple hundred each of transports, ballista, rams, and catapaults? Maybe from one single barracks. Except for the catapaults requiring a lv10 barracks the rest could be produced in a couple of hours by anyone with a few lv9 barracks in one city.

Edit - maybe not quite a couple hours but certainly not a week