Interesting. But ... why? Miners just need to be monitored, not sure why you want continuous access to all 4 at the same time at all times. Just install a remote monitoring tool and use a KVM or remote in if any of them go down is the usual go to that just makes sense for most folks. So that's why I'm asking... just wondering ... why.
Well, because it would be cool

That and because it would be useful. Useful because all I've done so far as a miner since I started 8 months ago was Nicehash and Zcash with Flypool. I did a little SIGT shitcoin and tried a few other things, but it's mostly been those two. I want to learn to mine other things, and tweak my settings, etc. and with 4 machines right now and one monitor dedicated to all the rigs it would be easy to do.
Sure, I could use remote control, but I've found that screen sharing apps eat a little bit of hashing power when you're connected.