Hi fionas,
I see you've had a fair few responses so far but i wanted to share my story anyway.

I moved out of home when i was 17, i moved in with a girl who was a bit older than me (my name wasnt on the lease) Mum said as it was my decision to move out of home i had to stand on my own two feet and pay for EVERYTHING (schooling, rent, bills, food etc)
At the time i hated her for it but now i am thankful as i learnt a fair bit about money.
Although my situation was a bit different i had a casual job and i also recieved youth allowance from c'link. Altogether from work and c'link i would recieve about 200 a fortnight and after payin my rent, schooling etc i was left with nothing at all.
I tried applying for living away from home allowance but was refused as mum hadnt kicked me out of home and there was no reason that i couldnt go back there. I also couldnt apply for rent assistance because my name wasnt on the lease.
I had big dreams of finishing VCE, but living out of home i got lazy and realised i could sleep in whenever i wanted etc and i also partied way too hard and i only finished year 11

When i was preg with DS i was 18 and found it very hard to get into the rental market having no 'proper' rental history even though i had had the same job for 3 years and had been fulltime for almost 12 months.
It was only by chance that my sister was friends with the property manager of one of the houses i had applied for and she pushed my application through.

GL to your DSD, its going to be very tough for her.
HTH