You have to look at it from a legal perspective. In my state, if one parent moves out without any legal separation or D, and without a custody agreement, that person can be held to abaondonment. To be blunt, you put yourself in a very bad situation when it comes to custody of D9 by moving out.
It may suck, but you need to move back in and stay there until you are legally ordered to leave. My EXWW tried to get me out of the home before a custody agreement. I told her there was no way I was leaving. EXWW went and spoke with a L and they confirmed that if someone moves out, the abandonment angle can be used in court.
Go talk to an L immediately and protect yourself. If you end up moving back in, yes it may piss your W off to no extent, but it will also show her that you aren't going to just lay down and give her whatever she asks for. Its time for you to work on yourself and your kids.
It looks like you have already done a bit of reading on Cadets links. Time to start DB like a madman. GAL like a madman, 180 those toxic behaviors. You got this. Its a really sh*tty situation and it hurts more than anything. You may or may not save your M. But you need to get yourself to a better place. Get yourself into a position where you know you will be fine alone.
Keep posting.
M:16 T:21 H(me) 38 WW: 38 S11 D16 D19 Red Flags of A: March 2018 ILYBNILWY: August 4, 2018 Moved out of MBR: September 24, 2018 BD/Confirmation of A: October 31, 2018 D Filed: March 27, 2019