Well, yes, exactly Alwayslonging no-one is suggesting marriages are sweetness and light all the time but a line has been crossed. And if you don't think about what you want to do next then what will happen next is that you'll be wary of asking him to tidy up papers in case it prompts a massive meltdown; you'll be wary of raising important issues (as you were when you were sitting beside him on the couch).
He did cross a line for you and that is what matters. It was a line for you. (It would have been a line for me too.) You need to be clear on what you want to do next before you have a conversation with him. Because he has shown that his plan is to ignore, ignore, apologise and deny. By not having a discussion about it, his actions are denying that he has thrown a massive spanner into your relationship.
It's telling that before he stormed out, he jumped to telling you that you couldn't afford to keep the house and consequently your first post fixated on the fact that you couldn't financially survive without him. He was trying to make you feel that you can't survive without him. You can.
Perhaps you could spend some of your time, looking at your finances and seeing what support is available. Because being scared of being poorer isn't a good basis for a relationship to continue. So, take that question out of your mind. Work out how you can survive and then decide what you want to do.
(I don't know if I need to point this out but he's very much following the blueprint for an abusive partner from blowing up over something trivial; making big threats about ending the relationship; creating uncertainty about what is going on did he go to work?did he bend the steering wheel? ; acting as though nothing happened)