Hang in there "tiredofex"! If your spouse's ex was working previously you may be able to impute her income and get the support lowered a little. Also, what he pays in insurance should factor into the equation. As far as the insurance goes, put yourself on your own insurance if possible. Doing so will allow him to claim more going toward the children if it comes to that. It sounds like the children are more appropriately cared for and have a much better quality of life during the time they spend in your care. If they stay in your care for a great percentage of the year that can be yet another factor in lowering support. If all else fails you may have to wait this one out. Above all else STICK TOGETHER. Don't let anyone with their own self serving agenda tell you to butt out or back down. My spouse and I have helped and supported each other greatly, consequently we have two very well trained ex's.
I no longer have time to respond to all the negative, closed minded comments on this forum. Surprising how those who are supposed to be taking care of several children in the home have so much time to spend on the computer. I imagine there are some little ones being raised by the tv and game systems provided by CS. Quality time well wasted. lol