Has any one had to acquire guardianship of a parent in order to take care of them?

My mother will not give my brother or I power of attorney, yet she doesn't pay her bills Her house payment has not been paid since my dad died in June and she thinks the house is paid off and that anyone who tries to talk to her about it is a crook. She owes her truck payment and we need to get back in the house to get the rest of her stuff out before it goes into foreclosure. Her real estate agent is trying to get the house into a short sale, she has a buyer, but the mortgage company has to agree, plus she has a second mortgage on the house that she says she didn't get even though there are papers with her and my dad's signature on. I can't help her straighten all this out if I won't talk with me. We talked with an elder attorney today and he said it would cost 3,000 to go to court to get a guardianship which includes doctor's visits and court fees for probate court. Every time we try and talk with her about it or the bills, she turns angry and mean and tells us to stay out of it that it's all taken care of,. but it's not.

My brother and I have taken her in our homes in SC (her house in FL was flooded in June a week after my dad's funeral). She keeps telling me that she wants to go back to her home, but she can't. She tells us that her friends and neighbors will take care of he, but that is not true either. Moving her around every few months is taking a toll on both of our families, but there is nothing else to do at this point.

I am afraid that if we go to court, she will snap and get sent over the edge and be committed. Any ideas or suggestions? Thank you.