You seem to be the only one unsure of wether you are rebuilding. Your posts describing your W's actions says she wants to rebuild or at least try.
What do you want?
TonyO can tell you all about hesitancy to move back home. It almost wrecked it for him.
My advice is to get her home and start from there. One day at a time. Do Not! I repeat, Do Not direct her towards other living arrangements. Also, Don't dwell on knowing her intentions. She may not be 100% sure herself. Her actions say alot.