am not here to start an argument or bash anyone, but here is my 2 cents worth from past experience and talking with fellow EMS brothers and sisters:
1) An independent ambulance service, either paid or volunteer is the way to be. In my area, there are very few services that are attached to the fire service. There was some volunteer ambulance services that were a part of the fire dept, but broke away. There was two paid fire departments in the county that ran ambulances, but dumped them, one was in the late 80's, the other in the early 90's. The fire companies want the ambulance to either save their jobs, or use the money to buy fancy equipment while treating the ambulance people like s*** and giving them piss poor equipment. The fire dept can care less, as long as it is bringing them in money.
2) In my town where I volunteer, our ambulance is independent from the fire service. I first joined the fire dept, then later on the ambulance. I used to get harassed by my fire company because I joined the ambulance. The one time I was at a fire company meeting and I got pulled aside and was asked why when we had a working fire in town that I was with the ambulance instead of the fire company. Talk about leaving a bad taste in one's mouth.
This is my opinion, like I said I am not here to offend anyone here or bash the firefighters that are here, because I am one myself. In my area that is the way it is.