B, One word of caution, I wouldn't cut him out of everything. I am going to suggest one change to your list. If there is a family function that you think he would like to attend, I would offer up an invitation and allow him to decide if he wants to attend. There are going to be times when his children have activities that both parents should attend...you do not want to give him a signal that you are done and do not want him in your life...you'll know which events to invite him to.
I doubt that he will have any idea as to what he wants to do about the relationship mid-way of his lease. The time to discuss the "lease renewal" would be towards the end, if he hasn't broached the subject w/you by then. You will need to tread lightly when this discussion takes place.
Keep in mind, you've given your h the space and time he needs. You've not put demands on him and that may be one of the reasons he's not screaming bloody murder for a divorce. Even though there are no cuts or bruises on him, he's suffering from emotional pain, a pain that runs so deep, he doesn't understand why it won't go away and time will help him reflect back on his life to find the answers.
It's very important to leave the door ajar, but you do not stand still during this time. You are to continue moving forward and focusing on you and your children. Life doesn't stand still for any of us and we all have a lot to live for. Your h is a time traveler and he will expect you to remain right where he left you, so do not be suprised if he doesn't remember birthdays, anniverseries and the ages of the children at some point. They are so lost during this time.
Now, it's a new day...what do you have planned for today? Is your little feeling better?
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
