Penngirl just catching your thread. It sounds like you're really struggling with this decision and it isn't about the property. Just from reading your sitch through I get the feeling that you are still in shock about still being married, but you have already made your decision to work on the M. The rest is just paperwork. There is passion in your posts when you talk about your M. Both of you are giving up OP to make this work. I'm know I'm making this more simple than it is, but you said that you over analyze and frankly so do I, so I thought I'd try a simple way to look at it.
It would be nice if you were married while you were working on your M. Have you run through your head what you think might be the atmosphere in the house in each of the scenarios? I know your H said he would understand, but try to picture what you think both of your behaviors would be in each situation and think about each of them for awhile. Hopefully some quiet reflection will help you see more clearly what you want to do.
My best to you and I'll look forward to hearing more.