Get them in Bible study first. Make them fast. I do not have time with all the counseling I do. I will sometimes fast after an exorcism if I feel real yuckie. Never expect money for an exorcism under any circumstances.
Donations are acceptable.
Never do an exorcism alone. Develop a spiritual team and stick with them. Never tie down or restrain an exorcee. It is illegal. This again is an indication as to who you think is the mediator.