Redoing a theatre network

Hello everyone,

so, we're a theatre, currently running the network on ten year old HPE infrastructure, with some arubas thrown in which came later. Apparently some guys up the ladder got the memo that ten year old equipment isn't exactly brand new (only needed a linecard to die while there was a play on stage making the lights flicker during the show). Now I am to guesstimate what a new network might cost. Currently we have mostly 5412zl (around 10) with some newer aruba's and two stacked H3C's as core. Since we are a theatre, everything has to work flawlessly during the show, the network is managing quite a lot, from people flying above the stage, to rotating the stage, turning lights on and off, pointing those lights, intercom systems for people to communicate and so on... Video and Audio are mostly excluded from the network as is, but we're going to put them on our network as well once we have a network which can support them, which brings me to my question: Which switches would you use for media production? Since we need things like streaming from a camera on stage to a projector behind the stage (4K and beyond), and audio from the actors mics to the audio system, everything needs to be as reliable, jitter free and low latency as possible while also providing a huge bandwith. How would you go about designing this kind of network and how would you make it cost effective? Should I outsource stuff like lighting fixtures which don't need crazy amounts of bandwith to ports on cheaper equipment? We're trying to replace huge SDI crossbars with IP equipment, so I'm guessing we're probably looking at stuff like Cisco Nexus 9k and Arista, or are there other vendors out there?

Problem is, I have never done network architecture and I'm kind of lost as it comes to designing a whole network. If you have any resources about IP networks in media production or theatres specifically that would be awesome. I'd like to ask more specific questions, but it seems I'm so lost I've been typing this post for the 3rd time and always it ends up rambling. So, to end it, if any of you now how to go about designing networks, or any specifics on theatrical networks at all, please point me towards any ressource you can think of.

Thank you all!