Our department had a combination of career and volunteer. Note I did not say professional. We were all professionals, some were paid, some not. We trained to the same high level. Almost para-military level. Even down to minute details like what days we changed from short to long sleeve uniforms. The training levels were extremely high. As a volunteer, I just had to put those hours in after my normal job.
I love it when I hear co-workers get into the whole Career vs. Volunteer debate. Some seem to have a problem with Volunteers, can never really get a good reason why out of them. Anytime they try to claim a "Professional" label I simply tell them they can call themselves "Career" all they want, but they are the farthest thing from "Professional" I have ever seen..