Most U.S. services only have 1 or 2 ambulances at each station, and in order for them to roll to a call or going emergency traffic, they must have a crew of 2 licensed technicians on board, so it makes it hard to take a unit home with you, and if I'm not mistaken, our units are quite a bit different than Australian units, in that they are much bigger, and are usually diesels making the fuel cost even higher...