I think everyone here knows what you have been through. I don't think sending him an email is going to have one single effect on him. He is such a delusional narcissist that he believes HE is the victim.
Has he been ordered by the Court to rent the rooms?
I would advise that before you have any contact with him you run it by your attorneys first. Sometimes there are reasons to keep your mouth shut. That old saying……"give enough rope to hang himself' is very valid in litigious proceedings.