NC as outing but I got 70% with severely disabled child as judge decided dc needed stay in house & I could get mortgage for lump sum.
I have read of a court case where the mum got 100% house as the dad of disabled child moved abroad and paid / did nothing and mum was on benefits only.
Future contribution and dependency can shift the dial and usual ‘rules’ may not apply. 50:50 and 60:40 is pretty common when parenting is expected to end at age 18 it doesn’t really take into account where one parent is a full time carer longer term and cannot rebuild by taking on more employment etc
Legally you cannot make him help with dc or live locally. He can make you allow contact but you can’t force him to have any if he doesn’t want to. So don’t assume you can rely on him for future help.
Social care are more supportive of single parents as they know you are all that is between the child and expensive residential care so you may get respite hours. Social workers are very used to dads walking away from disabled dc when parents separate.
Do look up specialist solicitors or direct access barristers in this area. Don’t take advice from non specialists everyone around me told me I had no chance of getting what I did. Get all the financial info together before getting advice as otherwise it will just be generic advice not specific.
Do use a benefits and CM calculator to see what you would get as a single parent
some mortgage companies will consider benefit income and CM. You need to know if you could raise a lump sum.
It can make sense to delay the financial side until a pattern of care has emerged as ex’s often promise to do their share of disabled childcare but then don’t follow through. This can build evidence that housing needs may not be equal.
While not without drawbacks shared ownership properties where the rent portion is paid from carers and UC may be an option for you. This may be better than giving up a share of the pension for house equity especially if you aren’t going to be able to downsize in future.
Dont underestimate the expenses and maintenance of a big house especially if its an older house.
Once dc get benefits themselves a lot of this can get taken by adult social care & parent carers often see a big financial drop at 18-20. So financially you need to work through different scenarios throughout your lifetime not just base it on what you will get now.
You will need to evidence your dc needs and future dependency on you eg any reports or social care assessments can be useful.