Part of me understands the reason why you would have a timeline; however, I am not sure if your intent it to "make it very clear to her" what the boundaries are, that you want to set a hard date. My point, is that maybe this boundary can be a bit more open - yet tied to when YOU have had enough. What is she was a week away from coming home? Just something to consider.
In terms of joint accounts....why not just remove her access. If she needs access to funds then maybe she should open her own account. At the end of the day, that is what she will need to do if you separate.
"The difficulties of Life are intended to make us BETTER,not bitter". "Fear is a prison, where you are the jailer. FREE YOURSELF!" "Life is usually all about how you handle Plan B." - Jack3Beans
