Attorneys often offer a free consultation. Please look around for three good family law attorneys, and get consultations from each. I believe you may be pleasantly surprised at both your options, and what you are actually supposed to get for support.
Your husband doesn't get to dictate what he pays in support. It is a state calculation based on what his income is. The courts rarely take into account what he owes, or what his plans are. Their focus is on making sure there is enough money for the children.

