@slowlygin
I'm sorry you're going through this. This is the beginning of the journey for you, but I'd be willing to bet that he's at least few miles ahead of you on this difficult road. You'll need to do a little catching up, and the best way to do that is to see a solicitor immediately and stealthily. He must not know. So, if you don't have access to funds in your own name, then reach out to your family, wherever they may be and beg or borrow the money.
In fact, I think you need to speak to your family regardless. Even if they're across the country they can still offer you emotional support. Many times we shrink from this as it makes it too 'real'. Well, my friend, it IS real. Not confiding about it won't make it go away.
I cannot stress how important knowing your legal position is. We (at least most of us) are not solicitors so the advice we give you is based on our own experiences and those of our friends and family, as well as I suppose a general knowledge of 'how this works'. But to know how it is to work best for you, you need to get your own advice. So make that appointment and do the research and possibly the actual house/compuler search for documents so you can tell the solicitor your monthly household expenses and your and H's monthly income and assets/investments. But if you can't find that information, don't let that stop you from seeing a solicitor. They can still give you very useful information and guidance.
At this point do NOT speak about or agree to anything he says! Sign nothing if he puts any papers before you. Do NOT agree to the house going on the market. Your response should be "I cannot think about that now" or "I'll have to give that some thought". And remember "Silence is Golden", so if you can't think what to say, say nothing.
Listen, you're going to hear a lot of speculation on why he's doing this. But IMHO, at this point does the 'why' really matter? Don't waste good emotional energy on trying to figure out the workings of his fucked up brain. He's ending the marriage. So you need to concentrate on the 'what' and the 'how' of ending up in the best position for the future.
As others have mentioned, separate bedrooms if at all possible. And if you so choose no more 'home comforts. He can do his own laundry, cooking, cleaning up after himself, life admin. If he wants to be single, let it begin now.
Please, as hard as it may be, behave with dignity. No crying or hysterics. No begging or pleading. Yes, he deserves it but it will it will only serve to further his aims and his self-justification. So dignity in all things, you will be glad in the end.