IMO, 22" too small for 9 cams (3 x 3 grid) unless you're no more than 6 ft. away.
What is your preferred viewing distance? That will determine the size of the monitor.
What will the monitor be connected to? A PC running VMS (like Blue Iris), a NVR or will it be a "smart" Android TV running an app like TinyCam, a not so smart TV with a Firestick running TinyCam or ????
OK...that's good to know.....that detail very well could have been in your original post, IMO.Hi is it a home application, I want to install on wall, I have option to connect direct to my Blue Iris server by HDMI cable or "smart" Android TV running an app like TinyCam.