The unmanagabilty is not mounting. It was never managable in the first place. What is mounting are the complications...the consequences of his actions. He is digging a hole and you are climbing in with him simply because you are either afraid or don't know how to stop this. You don't have to change addresses to stop this train wreck. You can protect what is left of your finances if you really want to.
Think about it this way. By supporting him you are buying his liquor. You might as well be driving to the liquor store yourself and stocking up. If you stop he will find another way...maybe work perhaps?