The cats will be happier in their own home - even if they don't get as much attention as they might if your daughter were taking care of them. Cats don't like change and it may take them as much time to settle in to a new place as it will take for your daughter to return home.
It's amazing how much people want to help when someone they love is going through a hard time - sometimes all they need is someone to direct their good energies to a specific purpose or task.
You should check with your local humane societies (go to Pet Finder.com and look for organizations by zip code) to see if they can help with your situation but I think what's best for the cats is to stay at home if possible.
Best wishes for you, your daughter and the kitties.