I'm on benefits, and I don't believe that this woman needs a 6-bed house. Youngest 2yo - can share with mum.
I'm sharing with MY 2yo.
Boys in one room, girls in another. Over 16's in their own room. Been pretty much like this where I live for at LEAST 15 years...
Only proviso is that if any of the rooms have sloping ceilings unsuitable for bunk beds, you can get moved to a property either the same size with better ceilings, or if necessary then go up ONE bedroom.
It's funny how in my town, anyone in council or HA properties KNOWS that any more than 2 DC's one girl one boy, and your DC's will have to share a room. Not many people have more than 3 DC's, even those on benefits.
OK, I have 4, but a) conceived DS3 whilst using contraception, have since been sterilised. b) was with Ex and he was working.
Doesn't mean my DC's have a bedroom each, though. Bloody pipe dream last had when I owned my own house, pre epilepsy dx, and my then 3 DC's had a bedroom each in my lovely bought 4-bed house.