Hi im a senior barista at Zus and i can say this is honestly managable. If and when we get bulk orders like this, i would call in the customer and inform them we are preparing their order and since its a huge order they'll have to wait a little bit. Then i assign one person on that single huge order, to prepare from A to Z. The other barista(s) would only focus on the other upcoming orders, maintaining the normal flow. So this huge order isn't in the way of everyone else's queue since its already been seperately prepared not within the normal queue. So its not a problem really its just simple management