If I were in your shoes, I would call the landlord and advise her that you are planning to remain a tenant no matter what happens. I would also thank her for not raising the rent at this time. No matter what you say to your h, he is going to do the exact opposite of what you want. So, I would let it go. Is there any way that you can ask the landlord to keep you in the loop?
Well, of course he sounded angry...how dare she raise the rent after 8 years! That's additional money that he wasn't counting on spending on something that isn't fun and exciting. He's not thinking clearly and please remember, they are emotional and it doesn't take much to set them off on a tangent. You will probably see/hear more of this in the months ahead. He's feeling trapped and he won't admit it, but scared too. He's seeing people in hospitals, people dying and the world is out of control right now because of the virus. There is no order and until things settle back into the "normal" stage, his plans for the future are on hold and that's driving him nuts.
They love to announce to the world that they are getting a divorce. Reminds me of a boy/girl scout getting a merit badge and how proud that they are of earning it. They want the world to know that they are finally going to be free to do whatever they want...unfortunately if a divorce should come to pass, that sweet little euphoria high that they have will eventually go away, usually about 6-9 months. The real world bursts into that la la land and responsibilities and bills, etc. still need to be paid. Can't live in la la land forever and that's when you'll see a stressed and unhealthy man walking around. They can't burn the candle at both ends because it will eventually catch up w/them.
So, for now, just continue as you have been and do not allow his announcing his plans for a divorce to rattle you. The courts are closed and nothing is going to happen for a few months. Poor man, close quarters will absolutely drive him up the wall.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
