Hi Tim, I've done similar things in the past, though not exactly the same. Here's how I went about it.
- You'll need a PC to be used for viewing, which will drive all four of these monitors. I used Matrox M series cards in the past. They'll have DisplayPort (preferably) or DVI output for four monitors, which you use a cable to convert to HDMI at the other end, which connects to...
- An HDMI over Cat5/6 adapter, which converts the signal so you can run it up to 300' on a single cable. Other models are available which use two cables for each monitor, and will give you longer distance, if you need it.
- At the monitor location, you use a receiver paired with that transmitter to output HDMI, and connect to the monitor. They make models that fit in a decora wallplate, which I prefer for neatness, though you could use a surface mount model, as well.
So on the PC, you run multiple instances of the Exacq client, one for each monitor, and add the cameras you want to that monitor. If you save a view for each monitor, you can update the view from any client. So you don't have to remote in to the viewing PC, you can edit the view on your own PC, remotely, and save it, and it will update on all clients running that view.
That video above shows some of the operation, as well.