So I'll be back in a week and I have to prepare myself for the in-home separation did anyone do this before
All the time. However, not many are able to live as though they are really separated. It is extremely difficult (by all accounts).
My tip is to separate the bank accounts. Divide the bills 50-50, or based on percentage of income. She should experience what life without you is like. If she wants separation, give it to her.
I believe you will discover she wants everything to be on her terms.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!