I would not try to get in between your daughters and your wife. They are all adults and can make their own decisions and form their own opinions. This is not something that will be resolved quickly.
The fact that your wife did not want you to move out of the bedroom is a good sign for the moment. In fact I would not move out of the MBR at all. If she wants to move out then that will be her decision. Stand your ground, keep up the detachment.
I am not sure how much you have learned about MLC or bipolar. I hope you understand that you can not FIX this.
My bad, I just read the link in newcomers and didn't realize that you are a newbie even though your registration date is 10 years old.
I can post all the links on your thread if you need them.
It looks like Grit encouraged you to post here.
MLC board is more about working on YOU. If your wife is bipolar and not getting any help for it there is not going to be much you can do to FIX that problem.
It sounds like by her age she is starting to go through periomenopause and that is going to MAGNIFY her disease, or any other problems that she has had in her life.
You will and have been tested to the limit.
My advice that I have given you still stands, you can try to learn what is happening.