You cannot help him, he needs to help himself. He is an addict and will lie and manipulate to get what he wants, cocaine.
It looks like he as taken everything from you. Your health, your home, everything and he’s still not happy. He wants you to support him through his hard times. What about your hard times?
It looks like nothing matters other than the drink and the coke and you there to support him with the money he needs to buy it.
Be good to yourself.