My daughter and 2 school age children are living in a mobile home with mold in wall, ceiling, and roof. My daughter is symptomatic with cough, lung pain, and nasal congestion and the children are spending most of the summer away from home until school starts in Sept.

Yes mold in any home can be extremely harmful. Do they own this home or rent or what?

Yes you can even sue for it possibly.
(Not if you own and no longer under warrantee or something like that)

Sick Buildings and Toxic Mold

Sick Building Syndrome

You can get respiratory problems from black mold. It's not good at all. Spray the mold with bleach and then spray white vinegar on it. If it's throughout the house, have it checked out.