Regarding costs, the RCC, C-130 Herc, Pavehawk, and PJ's do it for training. A win-win, in that the military gets the most realistic training possible for their primary mission, and the public gets help in difficult situations. The volunteer searchers are...well...volunteers who work for free. The only real cost in this case would be the Wildlife Trooper's time.
This general model is widespread across the country, and works rather well in my experience.