Tim glad to see you are still focused and I am also glad to see that you said to W that you could not afford 2 households. How does she expect to pay for a 2nd house and how does she expect to make ends meet if she is schooling. Does she have a job as well.
Truly when she moves out it will not be your problem to support her other than whatever alimony you have to give. We don't have that over here all a spouse has to pay is Child support for children of that R but nothing to the spouse so no kids no money.