Easily 3/4 of a bottle of JD a day for 4 years got me hooked. The realization that my life was starting to come crashing down made me want to quit. 3 weeks of nasty withdrawals convinced me to never go down that road again. Looking back, cold turkey was not the safe way to go, I should have gotten help. Not starting would have been much better.
His M.D. (who does NOT support legalizing marijuana) told us that after witnessing the ravages alcohol has perpetrated on so many lives, he would gladly trade booze for grass.
We can offer prayers and support (not enabling), but ultimately getting his life back on track is up to him.
Bad habit are why many remain poor. Imagine all the money people spend on booze or cigs over 30 years, it adds up. The what they spend on health problems from the booze and cigs. They bitch about the rich but squandered away their money for nothing that would help them.