At least in Nevada, you can grant someone temporary guardianship, and specify a length of time, or have it be indefinitely. I am NOT a lawyer, but I would bet that, assuming your mother didn't fight you for custody, doing it yourself would be better then ending up with a court order. Your mom needs guardianship for a lot of things, for instance if she is in school, or needs medical attention. Try to find a lawyer to talk to ( many libraries have free lawyer advice days) to make sure that I am correct.