Hi Beachbum,
Knowing your story as I do I want to say this: Schizophrenia is one thing, alcoholism is quite another. As in my case as you know my story well too, schizophrenia is one thing abuse is another.
If he can sail off to Atlanta and whatever else he does then he is just as d@#n capable of working, stopping his drinking and taking his meds.
Too much enabling goes on over at schiz.com and they write off very unacceptable behaviour due to schizophrenia.
At this point the one who is doing ALL the suffering and ALL the work is you no one else. His mother doesn't want to understand she just wants you to live with the load and he won't do anything he has it easy. Hopefully you through therapy and meetings can find the strength within yourself to end this suedo relationship and get on with YOUR life. Screw him he'll make out fine.
Ngaire