Hello - introduction and advice request

Hello

I would really like advice and thoughts on my mediator's proposals. The facts are:

a) married for 30 years
b) I am 57 husband is 55
c) 2 children 15 (year 10) and 18 (at uni)
​​​(d) both children live with me in the family home ( when daughter back from uni)
e) Earnings Me £13,000 pa. Husband £150,000pa plus bous
f) pension me £10,000. Husband £1.3 million
g) savings me £15,000. Husband had £50k but spending and down to £34,000
h) I represent myself and he has city solicitors
i) family home without mortgage £1 million joint tenants
j) Other assets are minimal, car each
K) CMS payment for 1 child to me of £1000
L) spousal support of £1000 to me
M) My monthly salary is £1000 husbands is £6700

Mediator said only 2 proposals.

1. Sell house now and then 50/50
2. Stay in house until son 18 on condition in 3 years time Clean Break an 50/50.

No future spousal support. Properties in the area are expensive, 3 bed property £800000 50 min journey to sons school. My mortgage capacity is v low. Mediator suggested I apply for universal credit.

I'm wondering how with husbands future earnings, my career sacrifice, huge disparity in our finances and future standard of living that this can be a fair and equitable settlement.

Thanks

Sophie