$2,500/month for child support on two kids on a yearly salary of $100K is high. Should be closer to $2,000/month. How much % of time does he have with the kids? If it is 0% then $2,500 sounds about right.
How long were they married? How much is spousal support?
Child support is paid post tax so if one makes $100K then after taxes they take home about $70K. Take away another $30K for child support and that leaves a person with $40K to support themselves. Less after you factor in spousal support.
Also take into consideration that the $30K in child support does not cover the expenses for when the kids are with you. You will have to use some of the $40K left over to support the kids while they are in your care.
I did not see any mention of imputed income for the wife. I'm sure she is fully capable of working so the courts (and his attorney's) should have made the support calculations based on her ability to make a minimum income of at least $25K year. That would reduce child support.
Lesson: It makes no financial sense to get legally marry or have children! Don't do it kids!
Edit: Unless the person you are marrying or having children with make more than you...if that is the case go for it! ...but I still believe the only thing legal marriage is good for is making attorneys rich.