So we agree it can provide the same as a manned RW platform operating IMC with a sensor suite.
You are not going to be searchin for much IMC - you do know FLIR doesn't see through cloud and fog?
If the RW Camcopter is the answer, what is its range, speed and endurance?
Don't conflate the clear success of UAVs in the war-fighting role with the very different conditions (and very varied terrain and weather) of SAR searches.