I have almost identical circumstances to you (but house worth slightly less, half your savings and I do work) with kids same age. I’m almost a year out from leaving and it’s been rubbish, but I’m coming out of the other side.
I thought my husband had checked out too after years of drifting and horrible behaviour (which I now recognise as emotional manipulation at best, abuse at worst), but that all changed when I tried to leave, and then eventually left. Let’s just say I was suddenly the love of his life and he couldn’t be without me despite him stonewalling me and my daughter for a month over redecorating her bedroom.
I’ve had a year long fight to get what I’m entitled to as he held access to our savings and needed to buy me out of the house. Will your husband be able to afford to buy you out or are you going to have to sell? That £250k you own is fictional at the moment. Are you planning to live together until this is resolved or move out?
I moved out because of the emotional toll of trying live with him and go through this and I think this last year has cost me about £25k in rental, legal fees (doing it on the cheap too!), furnishing a new house from scratch and now the costs to purchase a new house. My savings have been decimated and I have 0% credit card debt.
We’ve eventually agreed a 50/50 split on house and savings at time of split (although I’ve used all my half up now), and then 60/40 to him on our pensions plus a BTL we have as he’s closer to retirement and I’m a bit younger.
He’s buying me out so after it’s all gone through I’ll have enough for a 50% deposit on a house plus to pay off my debts, then a £140k mortgage and a reasonable pension (he’s a long term teacher and I’m most recently local government). I am on Universal Credit and have settled with him for 60% of the maintenance I’m due for my daughter as my 19yr old is still with him and in an apprenticeship so he’s supporting him (law doesn’t care about him but I wanted to support).
It’s been horrible (emotional abuse which has transcended into financial abuse) and has taken a massive toll on my mental health but with counselling and medication, I’m coming out the other side and our divorce should be finalised in November. I’ve met someone new which has been a developing friendship and have had my eyes well and truly opened to what a different relationship can look like. Like you I was with my husband from young (18 - we bought a house together then) and I am so glad I left for me.
The moral of my story…life is too short to be unhappy BUT the grass definitely gets muddy before it gets greener! Good
luck!