Should I sell my mother's house now?

She has Picks Disease, a form of Alzheimer’s. She’s in assisted living, and because of her condition, she does not understand that she can not move back there (will not take medication correctly, might leave a pot cooking on the stove, etc.). We (the kids) have power of attorney, but it would break her heart to sell it now. A very nice house sitting vacant, a money pit which we will most likely need the cash value of in about 8 years or more to help support her. Do we let it sit until her condition worsens to a point where she actually forgets she has a house? Who knows when that will be? The housing market is in the dumps!