Using 9 Apple TVs with 9 iPads - airplay bandwidth

[chuuchhackz]

Here's the setup:
9 HDTV monitors connected to 9 Apple TVs.
Client wants to be able to mirror iPad web/app content on each TV
More than likely they'll not all be going simultaneously, but the possibility is there.
Wondering how many airport extreme base stations would i need in theory to support the necessary bandwith.
Not even sure if I'm asking the correct question, but I think I am.
The internet drop will be fast enough for the basic web content they'll be accessing. More concerned with the data over the network for the mirroring/Airplay

Thank you for your help!