How to manage\update multiple Xboxes (efficiently) at same location?

Hello,

I regularly run lan parties at my home and I have quite a few Xboxes (18). Is there a better way to manage game updates than downloading them from the internet for each xbox? I have also tried downloading to one xbox then copying over the network but that is tedious as well and does not always work. I was thinking I could download the files to a separate device (pc or xbox) and then point the Xboxes to that device and download the files from that local source. Not sure if this is even possible. Any other ideas would be helpful as well.

Thanks

Hoop

:)