Ahh Cat, the weirdest thing is, DBing is like riding a bike...Blech....
When they wig out and go back to that dark place, you simply get back on that bike and peddle your big ole heart out.
Let yoru H feel the financial pain, let him see the crapp that he has chosen once again. Let him feel it all alone, do not comfort him in any way. My best guess is that he will try and play your emotions a bit at some point and use what he has learned through all of this to play on your heart strings. Stay strong and defocus him, stuff you already knwo but I am going to say it anyway.