Gonna be blunt here.. but considering that you're already doing a ton of things to ensure that she keeps up her current behaviors.. are you willing to start doing things that don't directly enable her ? When I was an addict/drunk.. I would have loved to have a nice place to live, people to care for me, and buy my beer/liquor.. especially if I threw really fun temper tantrums (ok that's sarcasm). And beer/liquor/whatever.. alcohol is alcohol. Does the same damage, causes the same drunk.
The best you can help, is to quit enabling her. Doesn't sound like she's interested in getting sober, much less pursuing recovery. You are not qualified to become a treatment center for an addict.
You can love someone to death.. literally.
Glad you're seeking out some alanon meetings.