I think it's great that you two had that conversation.
I also think it's good that you told her what your boundaries are. Boundaries are for us, of course, but in this instance it was good you shared them because it gives her the opportunity to take action (or not), which seems fair.
On May 1 if she has not quit drinking either she goes to rehab, or she moves out, or I move out. Period. No discussion. This is what it will be.
Boundaries are different than rules, basically you decide what your boundary is (I will not live with my wife if she continues to drink after April 30th). If she has not quit one of us will be moving out.
Whether she goes to rehab or her parents at that point, well that is all up to her, but I understand you giving her options, it is a long marriage and you are trying to salvage that, if it's possible.
As for the employment, that's secondary, of course, at this point.
I really really hope this rights itself and that she decides to get sober, for you, for the relationship and most importantly for herself.