Assuming 10 servings per pan, and you need 100 to 120 servings, you are looking at having to cook that many loaves. Doable if you have a large amount of oven space. It's a lot of work. I will say though, I have cooked in service pans that were 3" deep, worked fine.
I'm feeling bearish, and I'm packing a Wusthof Grand Brisket slicer from MABA
Whip It Off, Chambers!
"perhaps...but then again...maybe not..."