There are a lot of misconceptions regarding divorce and maintenance.
This is how mine worked - I have three children.
Everything that we owned, either jointly or seperatley was taken into consideration.
the house was valued at 130,000, we had 60,000 outstandig on a mortgage so the equity was 70,000
He had 10,000 savings
added onto that was the value of our pensions,
this gave a quite considerable lump sum, we went to court to decide what percentages we each got. As I had the children, I got the house equity and a percentage of his pension. This meant that I had to take over the mortgage to keep the house. I am on a much smaller salary than you but managed to get a mortgage for £75,000 ( i needed extra as the house was in a dreadful state of repair) as some building societys and banks (I am with the Halifax) take into account your maintenance and benefits that you are receving. you must apply for everythign that you can and do not accept a maintenance arrangement without it going thru the CSA as you will need the official documentation in order to get this income included in a mortgage.
If you could agree the percentage split between you, there would be no need to go to court. We couldn't and so ended up in court. My solicitor also advised me that uinder no circumstances should I apply for my absolute until the finances are sorted as you could be doing yourself out of his works pension/lump sum if he dies.
If you need to know anything more either post again or feel free to CAT me!