My husband is a jackass

Let me introduce myself: I am 37, white, middle class, mother to one boy (5 years old and wonderful) and married to a 30 year old, white, alcoholic, obnoxious, narcissistic Air Force sergeant. I have given him 7 years of my life, paid his (and his ex-wife's) bills, worked two jobs so he could afford a lawyer to get visitation rights to his son from his first marriage, gone without many things that I counted as essential when I first married him such as getting my hair and nails done so he could have things like a flat screen TV. I have been supportive of him in whatever he wanted to do and I have never given him a reason to doubt me. What are my thanks - he wants a divorce. He feels that family life is just not for him, he prefers being at the counter of a bar to being at home with us. Of course, after my lawyer tells me I will get the house, van, furniture, our son, child support, day care expenses, and alimony enough to cover medical and dental insurance and mortgage payments for 5 years he is suddenly willing to work it out, although he was quite clear in one of his frequent drunken ramblings it is only because he doesn't want to pay me alimony. He is a peach, isn't he?
I am unfortunately stuck here for the time being, we can't sell the house until April 2012 or we will have to pay back the $8,000 first time home buyer bonus, I no longer have any savings as HE went and spent it all on going out and a new car (a pathetic Pontiac G6, he could have at least bought something cool, that thing is a sad attempt at recapturing the Nissan 200sx he had in college) and I have no marketable skills anymore as a back injury has left me incapable of getting hired anywhere (I am a disabled vet) plus having been out of the job market for a few years raising my son has left me behind in the curve. I have gone back to college to try to be more marketable, I just hope it works. In the mean time I am living with drinky drinkerson who is cruel to me whenever he gets the chance and treats his son like a toy, something to be played with when he feels like it, IE there is nothing on TV he wants to watch.
I am going to divorce him as soon as I can get a job that will support me and my son. Is anyone else out there stuck with a man they hate?