While Anna may not have a lot of options inside the fundie community, if she chooses to leave (which is unlikely), there are resources not too far from her. A church like Jill’s would definitely utilize its resources to help a single mom like Anna. She would find help getting housing, furniture, childcare, even counseling, etc.
But this is all an exercise in futility. She will stay to the bitter end, because if she leaves, she has to admit to herself that her perfect life was only an illusion.