Hi, thanks for the response. The sensors are outdoor dual beam. Each sensor is around $150 and has 18m 90 degree range. I have 6 of those.
I would rotate each sensor 90 degrees based on the scenario. The sensors connect to a wireless base station controlled by an APP and separate keypad. the Base has relay outputs that can be programmed, though limited, would be enough to trigger the rotation.
Definitely cheaper using something other than extra sensors, I will be adding another 10 but they would be static.