Hi Jason and Sam,
Thank you for your input.
The iPads will be carried around the unit while using the internet but not while connected to an Apple TV. When connected they will be in a stationary position near the monitor (and Apple TV).
The unit is rectangular shape divided mainly by machinery. There are walls for the office to one side of the building where the router is kept but this should have little affect on wifi signal. The iPads and Apple TVs will be used in an open space within the building.
The iPad will mirror a combination of webpages and PDF documents. At this time we have no plan to mirror video or similar fast moving graphics so hope the connection should be good. We plan to only mirror each iPad display to one Apple TV at a time. Each Apple TV will be on a different production line against a flat wall.
We have looked at the idea of a HDMI cable but we like the idea of wireless streaming. There is also the issue of finding one which works with a protective case on the iPad. We were looking at the Griffin Survivor.
Many thanks,
Benjamin Phillips