Power of Attorney/Land Owner Name Change

[The Composer]

You guys seem to know something about everything, so I thought I'd let you try your hands at this:

My grandmother is showing early signs of dementia, and is forgetting simple things, like how to fill out a check, how to take medicine, etc.

She has two children, my mother and my aunt, who need to have power of attorney should she "lose her mind." There is also a need for her land ownership to be transferred into her daughters' names so that the land will not be counted against her as "assets" if she needs to pay bills.

If her daughters have power of attorney, can they transfer ownership? Can they do this without her consent (neither of them would ever abuse this privilledge) because she's stubborn?

Have any of you been in a similar situation?

Any advice will be much appreciated.

I'm in the USA for law purposes.

Thanks!