Do you both mutually agree to the divorce? If yes, then the both of you go to an attorney or go the local Legal Research and Defense place and they have free attorneys that will place you on a waiting list and give you a divorce free of charge. a uncontested divorce is soooo much cheaper than one that is contested. (when both partners cant agree to anything then it's contested)
Just make sure that it's an uncontested divorce, if it's contested, then yeah you are gonna have to have attornies.
continue to do your research and also call around to different lawyers and get some advice, most first visits are free or you can do a phone consult....
Your ex might agree to a modified plan, depending on your situation?
Is the plan working out great for him and your daughter right now?
Sometimes modifying the plan could make the other parent insecure about child support, so if you approached the subject and he knew money was not a motive, that might make it easier to compromise...
I do not have experience with changing the plan and do not know anyone personally who has done this, to be able to tell you the outcome.....Good luck....:)