Should exorcists get paid or do their job for free?

I was curious if you think that exorcists should get paid or not. I think they should go it for free since it is doing God's work and feel it is mockery of Jesus to do it for a salary. I heard Bob Larson charges $600 per exorcism depending how many demons a person has or that per person. Can't remember. What do you think about this?

If you think it is professional work and business and they should get paid like pastors, please explain why. I'm interested in your views on this.
Exorcists should do it for free (why)
Exorcists should get paid (how much)
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Should exorcists get paid or do their job for free?
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