Ok, maybe so, still not good long term to go through the trauma of being kidnapped to a prison in mexico by a drug cartel only to have your parents murdered(even if one of them sucks balls and deserves it). The long lasting psychological damage of that ordeal is not going to be off set by being placed with a well off relative.
And her father loves her and she knows it. Losing him will fuck her up big time regardless. She's not better off with a wealthy relative than she was with her now middle class, doting father.