((((((E)))))) It sounds to me like you are doing pretty well, though I am sure it doesn't feel that way! I think for the next month, the best you can do is to get through one day at a time, and then get through the next one. You know he isn't going to change his mind, and you know he is going, so at least you don't have to walk on eggshells as much.
Once he is gone, if he wants to wpew on finacial and legal stuff, ask him to spew on your lawyer! Or his! I'm sure it won't be fun, but if the negative spewage can get transferred tot he lawyers, maybe there will be less between you and H.