*sigh* So sorry to see that W is indeed moving/moved out. There's absolutely nothing you can do about this chugging train that is meandering all over the place. Yep, don't offer help to W with things since she's wanted to be an "independent woman!" Let her learn the hard knocks of life all by her lonesome self.
Keep the focus on your daughters and work on bringing income in. I'd urge you to network and look for other opportunities for a much more stable flow of income. It seems that your current job isn't doing that for you and your daughters.
You still write "only if W would...."
Gotta stop those wishful thinking stuff. W is gone. Isn't the least bit interested in working on the M, on herself, or being the devoted Mom of the year.