That's a tricky question IMO. Do the two of you agree on the terms? Are you willing to put any of that in writing? What happens if something changes? In other words, if she talks to a L, they are probably going to discourage her from moving out. An OP could convince her/you the arrangement is unfair. Would a divorce mediation service help you with that kind of arrangement?
I can see what you're doing. You're trying to show her love by granting her the space she is asking for.
