I have heard peple in loveless marriages say that they stay because of the money, and/or for the sake of the kids. Usually, the husband is the primary breadwinner, and the woman is unable to support herself if she were to leave. But your situation is different- you are the one with the job!!! Maybe you can try a separation, and see if you feel happier on your own. Your husband is probably going to realize how much he'll lose by not having you in his life, and, hopefully, he'll change.
It is also possible that he feels very inadequate being out of work and on disability since the age of 44. Men don't do well when they loose their jobs... my husband gets very depressed and anxious when he has to find a new job; maybe your husband is acting out in this way.
What can I tell you- marriage is never easy, but there are solutions and help out there. Perhaps marriage or financial counseling??
When all else fails, look inside your soul and go with your gut feeling. It is almost always right.