I don't know how much notice you want to give H that you'll be moving. How do you anticipate he will react? Will he try to 'throw you out' when you tell him? H may make it a living he!l if you tell him too soon.
You may want to get your ducks in a row first. Are there things you will want from the house that H may try to keep from you? Since H threatened you before when he told you he made all the money and he gets everything, I would tread lightly. There's no rush in telling him, is there? Also, think about when you drop S off at college, would it be better if this was out in the open at that time or not?
Me: 39 H: 39 S: 15 M: 18 years Bomb: 6/3/09 H moved out: 10/15/09 H moved back:5/30/10