I agree - contact a local elder law attorney in the jurisdiction where your mother resides and have them assist you with this process. They will need to petition the court, and this will take some time/money to complete. Good luck.
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Is she merely disabled or is she incapacitated. If she is not incapacitated, you may be able to get your mother to execute financial and medical powers of attorney so you can take care of her. I suggest you make an appointment with an estate planning attorney near you and discuss your options.