I'm not keen on using all of Skyrim's measurements. How much malachite and moonstone was in that chest? Also, keep in mind that in reality, it takes weeks to make a single sword. If he had a team helping him, it wouldn't really speed up the time required to make the blades, but he could make more at once. He won't really be able to make anything in the few days he'll have, but he could get the process started.