Remember. No matter what you do. Keep your daughter and your house. She wants out. She leaves. And always agree with her wanting out. Help her if needed.
This was the one thing I did right. While I feel my crappy dbing pushed my wife out the door, at least it's not me that is leaving. A lot of people here objected, and maybe rightly so, but I even helped her out financially. I actually made it easy for her, once she had made the decision she had to be "out now". It may have been wrong, but I am determined not to beat myself up over it. It's only money and I still say that this way if she ever chooses to return, it will be for the right reasons. And if not, it made one part easier on everyone including my kids.
It kinda sucks to live in a house filled with memories, but some "normal" is good for me at this point and very good for my kids.