I think it is very unlikely that you would be awarded spousal maintenance if her contested or objected to it.
In terms of asset split you will get a share based on need. This will be established through an assessment of your income (net salary with child support and any benefits you will be eligible for) and outgoings. Income needs to be optimal and outgoings minimal.
So although there is a significant disparity in gross salary, once that is netted you could more closer in terms of net income. If you have the kids most of the time your outgoings will be higher. This is what will inform housing affordability for you.
Pensions are usually equalised and if they are broadly comparable most people agree to ignore them. Due to the faff and cost of having them valued.
Assuming that there will be a coparenting agreement you both need similar sized homes. Sounds like a 3 bed that allows the children to stay in the same school. It’s likely his borrowing capacity is higher so you may need a bigger share of the assets. This bigger share is the modern version of spousal support. A large one off adjustment that creates a clean break between you and him. It will always be the outcome the courts prioritise.
However if he is required to pay child support this will be an ongoing obligation and it is inadvisable to capitalise this contribution. Because even if he did he would be obliged to pay it. Some people do this because they have informally agreed it but it very risky.
The issue for your divorce centres on where your children are in their education. If they are taking exams or about to take exams then proximity to school is paramount. If this cannot be achieved in the settlement, the disruption is a good reason to defer a move. Financially that’s not good for you or him especially given your ages.
However overall advice is be realistic about the need for your life to change. If you resist the inevitable you will waste money and time.