If the parents agree to terms, traditionally that would be ordered by the court. So, if you agree no child support would be paid and no alimony would be paid, the court would approve that because the parents are the best people to know what's in the childrens' best interest. However, in recent times, some judges refuse to sign such an order because legislation has been passed that the court must follow the child support guidelines.
So, what attorneys have done in the past is write in an amount on the "overall financial condition" line that offsets 100% of the ordered child support. Basically is allows the judge to still use the guidelines, but at the same time consider the financial conditions of both parties and make a $0 child support order.
I would highly suggest you contact Brian Mull with the Kansas Child Support Guidelines Advisory Committee to learn more about how this might work. You should also start doing your own research on appellate cases (kscourts.org) to see how such cases are handled in appeals. This is important to you because when you go to court and tell the judge the appelate court has already ruled this way, he knows exactly how he needs to order.