If you take him on, move in, mingle finances etc you will find some things happen as surely as night follows day:
He will spend more money than you could possibly believe on alcohol.
He will spend more time just drunk enough to prevent you doing normal every day things with your kids, let alone family occasions, holidays etc.
He will take up so much of your emotional efforts your kids will lose some, if not all of the mother they currently have.
He will very effectively make you believe that if you only tried harder he would be nicer.
He will succeed in making you believe that anyone and everyone else is to blame for his drinking.
He will succeed in making you believe that he isn't that drunk, he is just a bit sad and you could make him happy, if only you tried right
He will succeed in making you carry his shame. You'll be the one hiding his behaviour, hell just carry on doing it.
So far you haven't been all that connected and see how much you are trying to believe in him. Take a step back and think: what has he said and done that makes you believe you can save him? What is it you have been told, led to believe, that makes you want to believe there's a version of him you could love? What are you willing to lose in order to find that man?
If the answer to that last question is not: your wider family, your financial stability, the respect not your kids and your own sense if self, just don't do it.
Run ----> thataway. Right now. Use lockdown to give yourself time and space to get this man out of your head and heart.
His issues are his. Leave him to them!!!