when i was 18 (on my birthday in fact!), i had to move into assisted accommodation (usually 18-25, but i think sometimes that included 16+) by presenting as homeless to the council. i had threatened to leave from 16 but i definitely couldn’t have - i only left when my situation at home hit breaking point and police got involved (not instigated by myself - i did have a partner who’s parents helped me to get the right support)
when i tell you that place was the worst place for someone my age to be, i’m not joking
full of people dealing, teenage pregnancies, violent people, always fights and drama
a man tried to break down a door and attack me as he just snapped once. he ended up addicted to class A’s and living homeless shortly after
people who’d been to prison, were on the way to prison, someone who lived there was committing fraud and actually wanted by the police - he was a dealer who gave us a fake name
the support was abysmal in regards to safeguarding - i was constantly scared. on top of this, they also put you with a flatmate - luckily for me, the girl i was placed with was the only normal person in the building, and we are still very close friends years later! both flatmates she had before me became pregnant from men in the building within 6 months of living there in order to get a council flat
they also only give you UC, and you are not encouraged to get a job. you also have to pay 20% of this as ‘rent’ (it’s more of a token amount), so we would have around £200 a month total for all expenses. thankfully, i got a job and things got a lot easier - i was only there for 6 months but i look back at that time and thing WTF was i doing there! i am successful now and have a well paid job, a lovely partner and roof over my head.
the people that get put there get stuck in the system, and the cycle repeats. this was with a YMCA run place - i would say that this is the norm for the council provided places.
not trying to worry you but it might be worth outlining all of this to her - these people have trauma and have suffered all sorts, and are very sadly stuck in a vicious cycle
OP, i really hope she is just doing a classic teenager ‘woe is me, hate my parents, i have no freedom’. one week of a place like that and she’ll eat her words
i appreciate it must be very tough, but i thought i could share some insight - i would not mention paying for rent AT ALL, especially as she probably wouldn’t be able to be somewhere legally at that age without a job/in education
i hope it gets a bit easier for you all
xxxxx
ETA: specifying housing situation