Can't do that. Had to rent this place for at least 3 months. And that'd push her out of the house. Not fair.
You can do that, you're just making excuses and seriously, moving out is the worst thing to do when you have a WAW, let her make those actions & decisions, you don't have to, who told you to?
So you pay rent for 3 months at this place, ditch it, no worries, no excuses.
And you're worried about what's fair with pushing your wife out? You're not pushing her out, you don't get it, she's choosing to leave, you have nothing to do with it, it's ok, it's not your problem.
