Thanks for the further information and I note the substantial contributions you have been making to your family.
For a financial settlement arising out of the marriage, the court will not consider child maintenance if the child maintenance service has jurisdiction, which it will do in your circumstances. Any financial relief application by her will be for her needs (both income and housing needs) and providing her equity from the home or spousal maintenance will not discharge your liability for child maintenance.
In relation to what you would be entitled to from the equity in the home, the court's starting point is a 50-50 split of the equity of all matrimonial assets. Given your high income (and therefore better capacity) to obtain a mortgage or afford to rent, a court may be persuaded that the split of equity should be more in her favour.
In relation to timescales for spousal maintenance, court's nowadays are reluctant to grant long-term/life-long spousal maintenance provision except in exceptional circumstances. Given her capacity to obtain employment (due to her qualifications) you have a strong argument to keep this under review.
Of course an agreement in relation to spousal maintenance and a division of assets can be reached directly between you and then approved by a court.
For your information, in relation to child maintenance, on a gross income of £90,000 your legal liability will vary between a lower rate of £106 per week to a higher rate of £240 per week depending on how many nights, on average, the children spend overnight with you (the more they stay overnight the less your liability is).