If i were on my own....

[jampots]

lets say for example after xmas dh leaves and agrees to let me have the house if he has £20k worth of savings to get him started. With 2 children what maintenance would i get from him and would i get any benefits?

Are you working?
You need proper advice on this - don't agree an 'unofficial' settlement - it's not up to dh to decide what he needs to set himself up elsewhere.
You don't want to get involved in expensive legal wrangles, but a few £££s spent now could save you a lot of grief later.
Unofficial settlements often don't work - they give the bloke too much scope for 'not being able to afford' to pay you later on.
Get it sorted out in black & white now.

W/o knowing all your income and assets, no one will be able to determine that.

Get some proper legal advice.

so far as child maintenance is concerned, your dh will have to pay 20% of his net income. You may get spousal maintenance on top, it depends how much your outgoings are and whether your dh can afford to bridge the gap between that figure and your income.
How much are you earning now? if you work more than 16 hrs pwk, you'll get child tax credit and working tax credit. You'll also obviously get child benefit.

You need to look at the overall assets schedule inc. pensions, not just the house in isolation.

If you're not working you can make a claim for income support, but to be honest, you'll be much better off getting a part time school hours job (and yes, I know they're not easy to find), than being on benefits.
This advice is given pretty much in the dark and you really need to see someone who can go thru' all the details properly.

www.resolution.org.uk is the website of the national family law specialist assoc.

You may qualify for public funding but if not, most firms offer half an hours free advice.

You SHOULD get 20% of his income via the CSA if he was assessed under the new rules, but that doesnt mean to say you will. If you were on Income support you wouldnt see much of it anyway. if you were working you would.
entitledto.com or entitledto.co.uk to check about Child Tax Credit etc.
You would get housing benefit for rent, but not for mortgage.