It takes a great deal of courage to do what you are doing in the face of such a situation. I'm glad that you have another person in the house who seems to be on your side or at least a balancing figure for your husband. I didn't realize that before. In this case, you do need to sort things out and not feel like your own home has been stolen from you and your daughter. I'm really not sure how long other people's manic episodes last. Maybe days, weeks or months and you can't just avoid him when it's also your house just because he's sitting there all day. So long as you feel safe and you are standing up for yourself, that's all that matters. Being manic and depressed (if he's telling the truth to the ex) is a mixed episode. You might want to read up on them. I think there's a description on this site.
Hope you will find a great job and at least be able to take care of yourself and your daughter until he chooses to get help or decides to get another place.

We're here for you. It's a terrible illness, but he is still responsible for his actions and for recognizing that he's hurting other people by not getting help. At some point in therapy he may come to the realization that he's turned into his mother and that will upset him to no end...may be the splash of cold reality that will wake him up. Obviously you can't suggest it because he'll likely get angry and deny it. But I bet it will dawn on him if he does get into long-term therapy. I know I don't want to repeat the mistakes of my relatives.
Thanks for the update. Stay safe.