If you can find a Raspberry Pi or have one laying around you can try the project I’ve been working on from time to time.
It’s not the most user friendly yet but I think it’s at least usable and not too much hassle to setup and get going.
@gammagoat helped a bit testing it but I think has moved on to RX/TX receivers. And I’m always open to making any improvements I can.
I can run as many rigs as I want since only the active cameras are chewing up bandwidth and there’s no USB load on the streaming PC.