Hi there,
I don't know how long you have been married, I did read that this is your second marriage. Have you reached out to the DV shelter yet? They can help you with job training and whatever you need.
My ex also threatened divorce many times but I was married for 26 years. They do this for many reasons. It could be that he wants to go back to drinking and for you so just shut up about it, it could be all manipulation and control, or maybe just perhaps he does want to end it. I found out the hard way that if someone wants to end a marriage you can't do anything about that, they will treat you worse and worse, until you need to leave.
It is a kick in the stomach. There are many people on this board (SR) who have gone thru this. You do have support.
((((((((((((((((hugs)))))))))))))))