I'm very sorry that you are here, but I can assure you that you will get some good advice and support here. From your posting, it does sound like he's in crisis. Did something happen within the last 18-24 months that rocked his world besides being replaced at his job?
The confusion, not thinking clearly, is a sign he is in crisis. So he wants to sell and move to the US. Well, it's evident that he's not begun the process if he's still sleeping in the home. Sometimes they tend to spew and all you need to do is listen. Yes, he wants a divorce, but he's not done anything yet...don't help him w/this. However, you need to get your ducks in a row since he's acting irrationally right now. Set up your own accounts, make copies of important documents, if you have joint accounts, you may need to take some money out of those accounts to place in your new ones. Check your credit card balances and you will need to remove your name from them, especially if charges begin to show up that you aren't aware of. Don't put this stuff off because, if he's in mlc, he's going to start spending at some point, be it on toys or setting up his new place or even an ow may eventually show up in his life...but you need to plan and protect your assets for you and your children.
Now, what can you do about helping him? Leave him alone, listen to what he has to say and do not argue w/him no matter how much he baits you. If he's angry and spewing, just say "h, when you have calmed down, I will be happy to discuss the matter w/you". If he's upset, say "h, I'm sorry you feel that way" and walk away. You and your children do not have to put up w/the temper tantrums of a man child.
It's okay to begin looking around for a job. It doesn't mean you will get one right a way, but start getting your ducks in a row. Get on your computer and start looking at divorce in the country where you are living. Knowledge is power. Right now, you are the sane one and you have to be on your toes because he's getting ready to hit the mlc full blown.
No more discussions about how things are at home for now. He needs time and space. No more discussions about the relationship. Okay? Go on w/your life as if he's a roommate. The less stress you put on him w/questions about what he's going to do, the better. Why? Because he honestly doesn't know what he wants or is going to do. The more you push for answers, the harder he's going to run the other way.
Keep the focus on you and your children. Live your life to the fullest and definitely start setting up your own accounts. MLC is not for the faint of heart. It's not a sprint, but a marathon and no matter what happens, you are going to be okay.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.