If your wife is asking for supervised visitation - find the funds. However, there are some things you can do for free:

Mediation - the courts in IL will give you a mediator as soon as you request it. Ask for this since there are no lawyers involved. Actively work to resolve the big issues.

Visitation - unless there was a protection order or police report, this is a scare tactic. The court is going to give you every other weekend and a weeknight. Push for that. Agree to mutual restraining orders for both of you that govern how you talk to one another, not about your time with the kids.

Good luck