EEngr,
You could send the camera feeds directly to the existing ATC Visual Control Room, no need for the facility to be remote from the airfield.
My local airport has 2 closely-spaced parallel runways and has an 'approach monitoring aid'. A piece of kit that alerts ATC of any significant deviation from the R/W centre-line inside 4 miles from touchdown. They have had this kit for at least 5 years.