Op, as someone who has done the move you are planning.. i implore you... pls rethink. Anywhere...anywhere else but here.
How about near a coast or a major city? Think Manchester, Liverpool, the north East? What do you and DH do for work? Can you transfer skills?
Pls take on board all comments here OP. Especially from those who live/ed this larger affordable house , space to raise children, fresh air, fairy cake nightmare dream kind of life. I personally realised that about 6 yrs ago.
No amount of house is worth the loneliness, mockery and isolation.
Raise yr child/children in a vibrant cosmopolitan , no travel limiting , budget deficit , lived here 500 yrs and don't like londoners change, kind of a place/city. Find a place of opportunity, investment, amenity and culture. Immerse them and yourself in a great city or seaside town either north or south. Nurture yourself as a mother in that very same space.
You are raising little people and sustaining a marriage. I found it nigh on impossible to do either here! My nerves are frayed but not broken. I am leaving soon and doubt i will ever have cause to return to this county. Sadly, nothing or no connections here for either me or my DC.
My DH... we split yrs ago... pressures of enduring this proved too much. I blamed him and he accepted it was him brought us here. Onwards and upwards now, my DC's and I building a new life. DC no 1 already moved back to London, me and DC 2 following in next 2 yrs.
Future is bright, but its a London dawn illuminating our way!