You are talking about finances like you want to leave him and need to know what you'll have coming in.
And you have some fear and physical threat coming in.
And he has gone and you don't know when he will be back or what mood he will be in.
When you fight before, does he keep it going or calm down and be contrite? If he will keep it going, maybe you need to pack a bag yourself.
If you are at all scared, ring 999 and give location. Keep mobile charged and nearby.
Ramp things DOWN with him if you cannot trust him to be honest to. If he is going to flare up in your face, do what you can to appease him not out of truth, but out of safe keeping. This does of course mean you are then openly in a not safe relationship and need to take steps to leave.
Perhaps you want to give it a few days and tell him that you want to split up and he can move away for his career if he wants to.
You then really need to focus on your mental headspace - MUCH easier if he is partly to blame for it, and he will soon be away, and you will soon be happier and safer - but for now focus on keeping yourself straight, for you will need to go back to work to earn the money you're going to need for your children.
You'll have equity in the house I expect and you will need to earn money, and will he pay some? Maybe, maybe he will fight you. Phrase it that it's for the babies, not for you, and ramp any disagreements down when discussing money, and perhaps save them for the professionals when he has moved out and gone to his new job.
Basically, feel your way through, and keep an eye on your safety, and get yourself back to work xxx don't engage with arguments if you suspect they will lead to violence, and get to safety quickly if you need to.