Thank you for your feedback.
I am still trying to make peace with the idea that I can't force him into anything... but it's hard. Right now I feel that this is something that I have to try, as a last-ditch effort.
I called a few interventionists and you guys were right, they charge way too much for us to afford. I think I will try to work out a counseling meeting with one of them just to get some pointers.
His sober friends are onboard and started working on locating detox and rehab programs.
My son is 24 and will eventually make his own decisions... but I am his mother and I have to do what I can to protect him from his self destructive decisions.
Again, thank you all. I will keep you posted on how things go.