internet in the box

[Philip Lavine <source_route () yahoo com>]

Has anybody set up a Cellular front end (LTE or 3G) access to the Internet and a WiFi backend supporting 150 devices.
I need to provide temporary Internet access (7 days) to a convention center room that is about 2000 square feet.
Stooopid Aria wants to charge $50/user/wk and who knows what the BW is.