@Thefellowship ooof I hear you. I think you just have to find peace with the decision and accept that it is going to cost you.
I'll share my experience which I would not wish on anyone, in particular my husband as it absolutely exposed him to his 'rock bottom', I'm not suggesting this is your path, but along the way I thought a lot about the financial, practical and emotional reality of it all.
I had him removed by police and then put in place non molestation and occupation orders. It was a horrible time, but it did give me the breathing space to regain my peace and start divorce procedings, I was the money, so it was innevitable that I would end up paying him a lot of money in the process. I knew becoming bitter and twisted about this would not help even if it felt wrong on so many levels.
I got some great advice on another forum to think about what it would have cost me in the future to finance our life together, assuming we had managed to stay together. He fed his sober periods by buying 'boys toys' which of course I ended up somehow paying for, plus I footed every day to day bill, many of which I had no control over..... when I think about the effort I made to try to keep him happy it cost me so much so the divorce would have bought me freedom.
(there is the old joke ....why is divorce so expensive, because you are worth it...)
In the end he died before the divorce, but he did do some stuff that has cost me, but less than the divorce would have done financially and emotionally.
In retrospect I now feel lucky, but before all this happened I can remember endless dog walks when I tried to work out the scenarios for the future. The thing I was most worried about to be honest were the dogs and how I would look after them without someone else at home, when it happened I just had to make it work. Fortunately no children.
Wishing you luck and keep posting here.