I had a spare monitor from when i got new monitors in my office, so i bought a cheap wall mount monitor bracket and put one of the monitors on the wall. I then had a spare Raspberry Pi, which i installed Raspbian on which automatically starts on boot, Chromium and displays the Unifi dashboard and the live view of the security cameras. I then have a script that tabs between the windows every few mins.
Raspbian Booting Garage Ubiquiti Display Nov 2018
Unifi Dashboard Garage Ubiquiti Display Nov 2018
Live Camera View Garage Ubiquiti Display Nov 2018
Monitor Mounted Garage Ubiquiti Display Nov 2018