Lower the requirements for MCU and EMS Ops vehicles

I want to have mass casualty incident buses for each of my stations, but they require at least 20 ems stations per unit, which is very unrealistic for my area. The requirement should be lowered to about 7-5 stations. At least 1 EMS station in each of the counties near me has a mass casualty incident bus. The same thing goes for EMS operations support. EMSA provides these trucks for most EMS stations in my area. Very useful and the departments would use these units for a lot of the calls I have now in MissionChief.