@Greyhair59
Remember "No one is required to set themselves on fire to keep another person warm".
My DH has what I am sure is wet brain. He can 'function' day to day with self care but cannot manage his finances or keep track of tasks. I am not and will not be his physical carer but I guess you'd say I'm his 'carer from a distance'. I'm managing his finances (this is also to my benefit since he's in the family home) and trying to direct him as far as what things he needs to take care of in his day to day 'affairs', not always with success though. I also act as a go between and 'information resource' for his medical care. I don't have a problem doing this. But what I will NOT do is live with him or allow him in my car or home (he doesn't even know my address). I will only be in the same room with him in 'controlled circumstances' (ie a hospital room). And I will only go to the marital house when he is not there.
We have a legal separation so all our finances are now 'separate and sole'. I am not responsible for his debts or any financial 'ills' that may befall him. I also have the house in 'tenants in common' so my half of the house is protected from any liens or lawsuits that he may end up with.
I'm in the US and I know there are a lot of differences in UK when it comes to medical care and what happens if a person needs care. Here, if you have excellent insurance or are on Medicaid (insurance for needy) then you may have options for out of home care. But if you don't or insurance won't pay, it's basically 'Tough shit, it's their home too so here you go' if it's a joint marital home. There is no 'social safety net' to provide financially for out of home care or for carers to visit the home if you don't qualify for Medicaid. So anyway, I can't provide advice on what to do other than either you need to leave or fight for him to go to a 'funded' care home. I know that the latter is not easy! What you need to realize is that, given what you've said about your home, you are actually putting yourself in danger to act as his carer. What if you fall or get pulled down trying to help him? What if you both fall down the stairs trying to get him to the loo? And think of the mess you'll have to clean up if he 'doesn't make it in time'?
For the short time before I left (due to his temper and verbal abuse when drunk) I strained my back trying to get a drunken DH up off the floor and ended up having to call 911 more than once to get him up when he fell. I also cleaned up a few messes of his drunken diarrhoea (sorry if TMI) when he didn't make it to the toilet. Is this really what you want to deal with?
It's time to put yourself first.