The information provided in this answer does not create an attorney-client relationship. If you are interested in his legal services, feel free to call Chris at (303) 409-7635 at his law office in the Denver Tech Center. All initial consultations are free of charge.
Child support is money that goes to help financially support the child. Supervised visitation fees are fees spent to support the facility that is having to provide a place to watch the child and the parent, plus a supervisor, etc. So you can't look at the money spent on supervision as child support. It literally does nothing to support the child.
If the supervised visitation is too expensive, then perhaps try to find a place that has a sliding scale, or see if the court may agree to a mutual friend or relative supervising.