Husband wants to leave me; advice needed

[forsooth]

DH announced he wants to live separately. None else involved, but we row like crazy and he can't bear it anymore. We have one DD age 7. He wants 50 50 childcare and a 50 50 split of the savings/sale of house. No divorce yet; just a split of assets and live separately. But...at the mo he doesn't do 50% of the childcare, does about 20%. I don't want him to have our DD 50% of the time. And even if time-wise he had her 50% of the time I would still end up doing more than him as he doesn't get involved with the school, doesn't take her to the hospital appts(she has ongoing health issues)And I came to the marriage with four times what he has in terms of savings/assets, so 50 50 doesn't seem fair. We've been married 6 years. My health has also declined rapidly in that time so my earning potential is far lower than his and far lower than it was when I met him, so I would never be able to build up the assets I had when I met him again. If we split 50 50 now I end up with far less than I had when I met him. I thought of suggesting we go thirds, a third to him, a third to me and a third in an account to use for DD or to use if either of us are in dire straits. I imagine that'll be me as I will be looking after DD mostly so won't be able to work as much as him, I'll also be ill off an on with my ongoing condition so will not be able to work as much as him. I'm scared of the future though I'm looking froward to having him out of the way. He drives me mad.
Any suggestions as to how to split assets and childcare?

My twopenneth (although with the cost of living, it's not worth anywhere near that) is that I watched a dear friend separate.

She did the leaving - there was no one else involved. Her dh said he wanted amicable. Started taking their two ds a lot more, looking after them etc. They decided to go for the 2 year separation divorce so that no-one was perceived to be at fault.

Within 6 months all pretence at amenable was completely gone. He asked for 50:50 and got it at one of the early settlements as that was seen as continuing current arrangements. He gets the child benefit and tax credits for one of their children. He fought hard to keep the house, all his pension and quickly created credit card debt so that he paid less maintenance for the other child.

Within 9 months it became clear that he had had OW for at least 2 years.

I should point out that my friend had given up her career to look after the children and support him in his international role.

He has a brand new company merc in the drive. She has an ancient citroen. He tells the children that mummy took all his money.

Honestly, I would say that it is impossible to know how low someone will stoop until they do it. Pre-separation he appeared normal. Nice even.

Please be aware that waiting 2 years to divorce is not the easy route. It means that there are 2 years of negotiation that could be sorted a lot more quickly by making a swift clean break.

Oh, that is horrid. It does make you sad, hearing that kind of story. Maybe my advice is less valid then - my xp is actually quite a reasonable person on many levels.