I think it might be an interesting way for you to go. It would put your H immediately at a decision point - do I want to work on the M or do I want to work on D.
I think the first question out of the Mediators mouth would be "Are you willing to participate in this process to develop an amicable dissolution of your M" (or something similar)
After that, he or she would coach the two of you through a tough and realistic, eyes open decision making process - what are you going to do, where are you each going to live, how much money is needed, how much will be paid, the kids, everything.
Me 42, W 39, S8, S6, S2 M 11y, A & ILYBNILWY 11/08 Walking away from a bad situation.