Thanks for the replies!
@yage, I do think I am going to end up using the MacBook to accomplish this. I'm not quite familiar with the procedure you describe, but I thought I might run a digital signal out to an external DAC (even though from what I understand, the DAC in the MacBook Pro is supposed to be pretty good these days?). Is there any reason why the BubbleUPnP would be superior to going straight out of the MacBook?
@jbs I see now what the issue is; previously, it had not occurred to me that adding a device like this to the network would be any different than say, using my MacBook on the company WiFi. I just thought, hey, I stream from my computer on the company WiFi, why would it be any different? (I was wrong.) I'll probably end up going up the chain and arguing that it isn't so much a personal use case, it's something I need to be productive in my office and since I'm pretty senior around here, there is at least a decent chance they'll do it for me.
I appreciate the thoughts, everyone.

