I am telling her this but i think he'd quit his job rather than pay up.
And live off what? You're not eligible for benefits straight away if you've quit, because your circumstances are your own fault. When you do become eligible, it's UC with the expectation of you looking for work and taking a job when it's offered. This is what the poster who's friend doesn't want to work is talking about. Her friend doesn't have any reason eg very young DC or disabled etc that would mean she doesn't have to work, so if she doesn't work she will have her UC stopped. The ex potentially quitting isn't a reason for DD to not claim child maintenance. Even if he's on benefits she'll be awarded some small amount and when you're skint every bit helps.
The reason people are saying to get a job is because it's easier to get one with a current work history than after a long break out of work, when you've got no proven track record. People work when pregnant. How far along is she? She could potentially work from home if she has internet, the company might provide a computer. People applied for jobs, had interviews and started work over lockdown without ever having met anyone at the company. Depending on her skills she shouldn't rule out working just because she's pregnant. If there's other reasons, fair enough. In terms of UC, I'm not sure if there is an option to not work if you're pregnant. People with jobs have to work during pregnancy so I expect UC will come with an expectation of job hunting at this point, until she's given birth, unless her other DC is of an age that means she's allowed to not work.
would imagine she would be bumped up the HA list considering she has a dependent and another on the way. You need to make it clear to the housing association you have no room for her and the kids at yours and they cannot stay at with you as this will go for her and help her become priority. From what I remember you could only turn down 3 properties before you were turned down
As she doesn't currently live with mum, DD doesn't need to do this, as mum has no legal obligation to house her. She'd only need to do this if she moved in with mum and realistically a vague "she can't stay here" won't help much. It needs to be an irreparable breakdown in the relationship and she's being evicted on X date. You're thinking of permanent accommodation. For temporary housing there's no veto option, you take what you're given or you're wiped off the priority list. If her private LL evicts her she'll become a priority then.
OP if she moves in with you, it will affect your relationship. Better to have you in her life providing whatever help you're happy to from a distance than to move in with you, have the inevitable major falling out that will occur when she - spends money in a way you disagree with, parents her DC in a way that isn't yours, DC get older and argue like teens do or take over the home noisily with their friends, DD gets a boyfriend who you may not approve of and he always seems to be there or their relationship isn't progressing how you'd like or as fast as you'd like ie she's not about to move in with him but they're always out having fun, then you're resentful she's not seemingly grateful enough for your help and is having more fun out all the time than you are living with all these people in your house, she's resentful you won't let her live her life how she chooses without making comments, the DC sense the atmosphere and are difficult, and everyone is miserable having a hellish time that your relationship may never recover from.
Having a quick google suggests that la housing is a benefit that pays rent on privately rented places and is nearly £900 in my local area. Sounds too good to be true, no?
Have you looked at the rents in your local area? You'll soon realise the maximum for a 2 bed property is £900 for a reason. It's set so you can afford approx 25-30% of the properties with enough bedrooms. They are unlikely to be the best property or in the best area. And just because you can afford it doesn't mean LL will accept you, many won't either just because the person is on benefits and they know that one mistake from DWP means the tenant may default on the rent, they know that tenants will have trouble finding another rental and may stay put without paying rent until they're evicted if the LL ever needed the property back, or they may have financial criteria eg an income of X times the rent that someone on benefits just hasn't got.
For private rental she won't be hit by the bedroom tax, which isn't a tax at all, it's a reduction in the amount of housing benefit someone can get if they have a room they're not officially deemed to need. Housing benefit is for people in housing association property. The max housing benefit pays the entire rent. So where someone is entitled to the max but has an extra bedroom than they're deemed to need, their entire rent won't get paid as there will be a deduction in housing benefit.
Local housing allowance is for private rental and it's calculated on where you live and number of bedrooms you're deemed to need. They don't care what the tenant does with the money as long as it goes on rent. So if DD rents a 3 bed place and pays the shortfall, fine. If she rents a 2 bed place that's more than the LHA and pays the shortfall, fine. If she rents a 1 bed place so there is no shortfall for her to pay, gives the DC the bedroom and sleeps on the sofa herself, fine. If she eg lives in your garden shed summerhouse for free and claims LHA, that's fraud, not fine. If she's entitled to £900 and rents a 1 bed for £850, she'll get £850, fine. If she rents a huge farmhouse with a pile of friends and her share comes to £900 or less, she'll get her entire rent paid, fine. You get the picture.
Worst thing she can do is move in with you. She'll never get a housing association place and if she's someone with no prospects who realistically is going to be in a min wage job all her life, it helps to have the cheapest rent possible ie social housing and it gives stability not to have to move all the time because the landlord is selling up etc. If she can't afford her private rent due to partner leaving and gets evicted by the courts, she's officially homeless and a priority for housing.