I was just thinking about the lack of barracks myself, though it seems that the magisters are quartered in various tents and marquees and even just out in the open around the castle grounds. Which may or may not be realistic, but I guess for a long-term "processing facility" some more permanent accommodation might be in order. But to play devil's advocate (something I tend to do fairly badly, so whatevs) it does draw attention to the extravagant corruption of the more senior figures.
