Op, what’s the odds of him going for fifty fifty, it seems highly unlikely due to his working hours. It is more likely he will agree something with you, that suits you both
Ok so with half the savings and half the house, what does that bring you to? 250/60?
Because with his pension thrown in there is a good chance you might be able to keep the family home mortgage free Ie it becomes entirely yours as a clean break, you give up rights to his pension and you then get child maintenance for the kids, this means they don’t have to move. Half his pension would be worth a shit load more than 75 k.
So you get half the house, 175k, 80 k in savings, that’s 255, possibly more. The house is worth 350. So assuming his pension pot is worth way more than 200 k, and I’m assuming it is, then you get 100 k from it. Which takes you to the 350 house value
So he just gives you the house, his and your175 equity, he keeps all the savings, and then can use this to buy another property.
In return you sign a clean break, no entitlement to his pension going forward, no claims on anything he earns in future. You walk away,
So then you own the house, you stay put, and the kids stay put, and you have 2600 a month to pay the bills and live off.