While I like the idea of setting a deadline with YOURSELF, I'm not a big fan of communicating that deadline to a wayward spouse. Because inevitably, they will continue to cake-eat until juuuust before your deadline, at which point they will promise you the moon and the stars not to go thru with leaving them (or filing, or whatever).
It's like telling the terrorists that you'll give it six months. They simply wait you out, and at six months and one day, they have their way.
