Jack, you don't have to do all this, the lawyers are supposed to be doing this for you, also if there is any question about money, it will be weel worth the cost to hire a forensic accountant for a day or two, they will dig in, see if he has hidden or diverted money that rightfully belongs to you and your son.
I had a friend get divorced and because their daughter was in private school at the time of the divirce it was mandated that the father pay tuition through completion of high school in addition to child support.
I also thik that given your husbands legal troubles that you will be able to get supervised visitation mandated in the agreement.
Best of luck,
Bill