Hi Forestlake, Welcome. As I read your post it sounds as if you are conflicted about whether to stay or go and are weighing your options. Although it is always difficult when dealing with a partner with BPD, I wonder if you wouldn't get better answers and support from the other boards, specifically the one for people "Conflicted" about staying together. Here's the general guidelines for that other board.
https://bpdfamily.com/message_board/index.php?topic=56291.0Plenty of people here are wrestling with similar issues and bounce between boards. For me, I'm in the detaching phase of a massively failed relationship which is 15 months in the rearview mirror. Details of property and income division are not in the purview, but would be topics of discussion on the other boards. Sounds like you're not done yet, and have some things to work through before you get to that decision. Good luck.