You have to realize that real world rules still apply even when using spirits.
While spirits can help you obtain a house when you have bad credit, it may not be the kind of house you want, and it may take a long time to manifest because of the various obstacles in the way. No spirit, no matter how powerful, can completely override the mundane requirements.
That being said, Lucifer helped @Eye_of_Ra obtain a house, so he may be able to help you.
As for your friend, rather than trying to get rid of Child Protective Services, whose job is the welfare of the child (and chances are you are only getting one POV on the situation, that of your friend, so you really don’t know what the truth within the “BS” is) I would recommend an entity concerned with the welfare of children, like Hathor or Hestia (who is the Goddess of Families, and would have a vested interest in keeping the children with their mom). They will ensure that the children’s safety takes priority over whatever story either your friend or CPS is telling and, if your friend is in the right, will help reunite her with her kids.
Edit to add: I am not a fan of government agencies such as CPS, but I know from experience that bureaucracies like them are very hard to influence due to their natures, so that is why I suggest focusing on the welfare of the kids rather than trying to affect CPS itself.