I don't like it either. Child support is child support and Maintenance is alimony. Two separate issues with, as LdiJ notes, different tax treatments. There is no reason whatsoever to combine the two. OP does not mention the length of the marriage or the salary difference to know if maintenance is even an issue.I miss interpreted OP's three year statement. My apology.
If maintenance ends when the children age out, then say it that way. To me that clause means when the children age out the court will review whether the maintenance should continue. Am I wrong?
Or does "held open" mean that Sara can go back to court and ask for more whenever she wants?
Either way, I don't like it.