I suppose that should have been obvious. I would have liked to see rough prices quoted for this since I imagine it could be pricey as well.
Between $100-750 per day. Some plans charge per device, some per jack, some per event. At some events you can get away with using hotel guest Internet, which is cheaper ($10-15 per day). Typically other network connectivity (fiber point to point, dry lines, VLANs, etc) is also expensive. Power is sometimes charged for, but in some states that is illegal or included in the room rentals. Some hotels and convention centers get around that by charging to hook up power, charging for the power drop equipment or charging to turn it on.
Don't ever underestimate a hotel or conference center's ability to bill large amounts of money for services their captive clients need. Coffee is $60 a gallon.
Prices quoted are from major brand hotels and major conference centers on the west coast of the United States and are in US Dollars.
It came in handy at a conference where the provider's network went down and we could still process credit card orders over the cheap hotspot. Though I imagine that if everyone used them, the cellular networks would not keep up with the demand.
Except the conference centers would charge the carriers millions to install any equipment, so the signal usually has to punch through windowless buildings from the outside.