OP, I'm pleased to see you making practical plans, despite absolutely breaking inside. The shock will stay with you a while, I'm 18/19mos on and still reel from it all.
As other posters have said, his behaviour will change, i experienced horrific emotional/verbal assaults in the end and threats to my life. Mainly because I exposed him and he wasn't able to play the victim card and I showed everyone the man he is. By default my children also suffered as he said horrific things to them to hurt me. It was appalling behaviour.
I am now zero contact with the man I spent 15 years with and have two children. I maintain contact via ex mother. Such was the abuse, I cannot risk my emotional and mental well being by even being in contact with him.
I did use my position to keep the house. My ex lived extravagantly after our separation to impress his younger gf. He was broke and in debt and I (rightly or wrongly) used that desperation to settle on the house quickly and in my favour. Luckily we were not married.
I want you to know, that it will be ok. In those early days I was in a tail spin, not just for days but for months. Slowly but surely that emotional fog lifts, you won't notice it at first. You will see it once enough time has passed and you can look back, and you see a different woman has emerged. Much like a butterfly, it is a painful and enduring journey, but I assure you, you will be a thing of beauty once you emerge from it. You will give less fucks then you have ever given in your life. You will have less time for fools, and you will not be ashamed of the battle you have experienced. You will wear your battle scars with pride, because you know, without a shadow of a doubt, you can take what the world can throw. At the moment, the fates are testing you, you will victorious.
Visit these boards, I still do, even when I am having a wobble or when I see another tale similar to my own i can offer advice and experience.
You will become wiser. You will be less stressed in the end, because you will know what real stress is, you won't sweat the small stuff and you will face the big stuff with dignity, grace and vigour.
You will be ok.
Your 'h' well he will reap what he has sewn. There is not a love in this world I would miss a moment with my children for. He will most likely do what many do, be an EOW parent, a tick box exercise, he's not been a hands on father to date, that won't change. He may not see it immediately and you will wish that someone would grab him and tell him to stop being an arsehole and a half hearted dad. The person who will deliver that killer blow in time, will be one of his children. I know if I was on the receiving end of that, I would crumble.
He may not fully comprehend the consequences of his actions yet, but I'm sure he will.
For now, it's you and yours against the world. You will be a strong team, a triangle is a strong shape. You can do it, and even when you think you can't, you can.