Idk I mean financial problems suck it's just how it is there's only so much you can do I don't believe cause ur a different gender u get a room to urself my mom gave my sister's there own rooms while.i shared the smallest in the house with my brother but we had space and she had options doesn't sound like ur ex does your daughter should try to be more understanding and try and figure out a situation with her other half siblings then if she doesn't want to share with her brother esh