Gareth A

All the tours I worked on that went to No1 houses the FOH loom from memory was 75M though that was the time of DMX rather than artnet. Though this was for lighting from Dimmer city > desk I guess if your adding in radio mics it wont be much less. 

From memory only one venue (not in UK) did we need to add a 10M extension on. 

In the theme park would - we would use either an Alcorn Ride Player or Weigl device. Ride players from Alcorn are very expensive, but a Procommander3 can do lighting, audio and show control all from one box. . . and its solid state, has GPIO (from

https://weiglshop.com/collections/procommander-series-dynamic-media-driven-show-control-devices-animatronics-and-beyond/products/wpe-procom?variant=39213682632

These are not domestic units and you would need to buy a programmers key for the conductor software, but I have come across hundreds of these on the projects I have work on through the years and they are reliable and their range is getting wider.

Yes have done this quite successfully a number of times.

Can be a little tricky setup between camera, recorder and mac, but I always got it to work both on HDMI and SDI.