MI=mental illness
If you are currently ill and getting treatment, maybe now is not a good time to be making major life decisions. I would never advise to leave a marriage or shut down your business unless you are of sound mind and able to handle the consequences and do right by your family and employees. I'm sorry if I didn't make myself clear.
My main point is that as you get better, you will be better able to make sound decisions and changes. Be patient with yourself and take one day at a time.