Glad you've reached agreement about mediation, OP.
I'm trying to be kind here - your language sounds detached and over-formal, and that may be a result of your current mental state. If that's the case, I hope you'll make treatment a priority over moving away.
I cannot for the life of me see how you can support a second household if you're on a low wage. How will you cope financially? How will there be anything left to support your children? That doesn't mean you shouldn't move out, of course - if you're being emotionally abused, then you must go. However, that would mean you were leaving your children to be brought up by an emotionally abusive man (or more likely, his parents).
You have only been working out of the home for a very short time, you have a low income (albeit with prospects) and you are probably still suffering from depression. Not a good time to be making major decisions which will impact hugely on your young children.
I would say exactly the same to a man. In fact, on MN, a man would immediately be asked why he was leaving. If he refused to explain (as is your right, and would be for a man), he'd be accused of having another woman. If he said he was depressed, he'd be told to get himself some treatment and not abandon his partner and children.
Finally, in the last post I've just read you say, by staying, I'll get depressed again - so do you think your depression has lifted only temporarily at the thought of an escape? If that's the case, it needs to be treated properly before you make decisions which will affect your children in such a drastic way.
Take care 