Lot of Walk Away Wife verbatim script in your sitch, not surprisingly. As you must know, same thing happened to most of us here (and especially on Newcomers' Forum): Aliens came down and switched our spouses with an exact, though alien, replica.
M Walk Away Ex Wife, proposed (and I agreed to) $17k of bathroom remodeling and replacement windows 6 weeks before moving out.
It does get worse. And better. And worse. That's the roller coaster. You'll hear a lot of good advice and coping strategies both here and at Newcomers, but may I recommend right off the bat, The Journey From Abandonment To Healing by Susan Anderson who has worked exclusively with abandoned spouses for over 25 years. Great book. One of the best. Has helped me more than any other, and I've read many in the past year like most people here.
Tell more of your story. Post here, vent here, get it out of your system here and run new ideas "up the flagpole" here, for feedback before taking mahjor or drastic action. Talk to you soon.
Gardener
"My soul, be satisfied with flowers, With fruit, with weeds even; but gather them In the one garden you may call your own." Cyrano deBergerac