I can relate to some of what you're going through, though my AW hasn't peed on the floor yet, and hasn't tried to kill herself. She does take a cocktail of anti-depressent drugs, all of which say not to mix with alcohol. She's fallen several times while drunk, recently breaking her ankle.
I also understand your feelings about leaving her alone. My AW is technically disabled, and refuses to do housework. (Her disability is psychiatric) If left alone, there's no telling what would happen. On the other hand, if she refuses to get help, am I obligated to stay and watch her destroy herself?
I hope your wife gets help. Keep posting... there are people here who can give you good advice.