I do not have a spouse with it but I have a very close friend with a H with it.
The times of rage are fewer with meds like an anti psychotic that just went to generic and MUCH cheaper than it used to be. The usual lithium is not very expensive either. I would find a way of getting him care.
No matter what you do nothing will be as cheap as a doctor's visit and meds for him. If there comes a time he is raging as bad as it was, go to a woman's shelter. Find one now so you know what to do if the time comes. If he hits you, it will cost you the doctors visit and he still won't have help.
Then find a support group for you as the spouse. The numbers are not in your favor for having a successful marriage. You need all the tools you can get to have a chance.
My friends H uses moodscope.com to track his moods and automatically send her an email copy of his score. They are working on a code word for when his anger is getting out of control. All this really only works with medication and counseling.
If you are in danger, GET OUT!
Edit To ADD: The BPD diagnosis makes this a WHOLE DIFFERENT story!
Find that woman's shelter NOW! I have a mil with BPD. Meds help very little.
You need this website
BPDFamily.com
You will find a board there filled with people specifically with your same situation. It has lessons on communication and boundaries. It will be a great help! Go to your library and get Stop Walking on Eggshells.
People with BPD think they are justified whatever they do to you. They are dangerous. Please get help for yourself. Very, very, few get counseling. Don't tell him you are leaving. They react VERY badly to perceived abandonment. Find that woman's shelter!