You relocate and hopefully he won't go with you.
You are not a slave to this man. He does not sound like his bipolar is that severe (I also have a mood disorder) and he refuses to help himself. Why should you keep him in your house while he acts like a child, makes no move to get employed, and abuses you? You have given him too much power over your life and YOU should be in control of your life. If it were me, I'd make him leave and find his own way, but I understand that we all have to learn to detach in our own way.
A few ideas that most of us here utilizie:
My house/my rules--He lives in YOUR house and he either follows your rules or he can not reside there. Is he using drugs to self-medicate?
Respect me or don't talk to me--Many of us demand respect or we won't talk back to the disrespectful person until they modify their way of speaking to us. Why can he boss you around like a toddler in your own house?
I can understand why your ex doesn't want anything to do with him. You should not, if you want to stay mentally healthy, allow his man (and he IS a man) to tell you how you caused all his problems. That's baloney and it's mean. He has no right to talk to you that way when you are housinjg him and paying his bills. I personally wouldn't listen to that even if he were on his own. No rules say we have to put up with things we would never put up with from a spouse or friend just because we gave birth to somebody twenty-five years ago. He needs to man up and stop being dependent yet abusive. If not, you could be eighty years old and still housing him and putting up with a 60 year old man's abuse. A bipolar diagnosis is not a death sentence. He could take care of it, work, have friends, and stop living with you. He just doesn't want to and you care more about him than yourself so you allow it. But most of us started out this way and had to learn to put our own needs first. It is different if they were minor children, but they aren't. He's not a little boy. You'd send him to a time out if he were. You need to set him free to learn how to deal with life, in my opinion, and learn to love yourself. Are you in therapy at all?
I hope you read some threads here to see how we deal with our own difficult adult children. You can not change your son and it isn't a good idea to still be his mommy at his age, in my opinion. There are men his age who fought in the war, had injuries, and still take care of themselves. He needs to grow up now or he and you will never have decent lives.
And we want you to have a good life. You should not even think about checking in with your son to see if it's ok for you to move. Move! In my opinion, from the way you describe him, it would be best if she did refuse to move with you and spent time on his own, even if he has to live on the street or get a job. Bipolar is no excuse for being abusive or refusing to work. And if he won't take his medications, well, he's just being a big defiant baby...that's his problem, not yours.
"God grant me the serenity to accept the things I can not change,
The courage to change the t hings I can,
and the wisdom to know the difference.
Even if you are not religious, take out the God part...the words are still wise.
I with you luck. I know that at first the idea of detaching from an adult child that we have enabled for years is shocking and even offensive. But think about it. Do you want him running your life, like an abusive spouse? What gives him that right?Why do you think you have to take care of him, and put up with abuse on top of it? What have you done for yourself lately?
Hugs and good luck!