Australian air ambulance services are also a solid income stream for the operators: Toll and Babcock/Australian Helicopters wouldn't be in to a substantial investment in machinery and crews otherwise.
I saw a 9 figure sum reported for the five AW139s contracted to the Victorian Air Ambulance contract over ten years; no doubt Toll would be well into the same revenue for NSW.
edit World-class helicopter fleet for Ambulance Victoria
$A550 million: estimated!