My mother had a stroke in 2014, she lives with me and has fully recovered, how do I get her to move out?

My mother, 79 years, has been diagnosed with dementia, and had a stroke ( brain bleed) shortly after I thought she should move closer to my home. She is a hoarder, and it took more than a year to go through everything in the home to get it on the market to be sold.
She recovered from the stroke although she was not expected to survive, and is basically independent, however she will not move out. I have asked her many times that she needs to find a place, but she refuses to follow through. Her house is sold, and the deal will be complete in 2018. With the proceeds of the sale of all of her stuff, I managed to pay off her 52,000.00 debt and she now has 10,000.00 in the bank. Her house is Leased with option to buy.
She is driving, going to doctor appointments, shopping ( way too much). She makes simple meals, breakfast and lunch and I make the more complicated meal of dinner. The only signs of dementia that I see is that she is easily confused/agitated, and does not remember directions or answers to simple questions..I.E." where are you going ? " She will ask a few times before it seems to sink in.
I have issues with my mother, however I brought her here because I was told she would not fully recover. She resents being here, is mad that I emptied her home and leased it out. She resents everything I advise her to do. She complains to my friends, as if she is the victim. This has caused so much stress upon me and my husband. We have a great marriage, but I am often consumed by her ungratefulness, and waste many moments upset.
I have told her again today she needed to move, and the same thing has happened. She retires to her room and avoids me for a few days, hoping I will drop the subject. We have gone to a few rentals and small homes for sale, but she finds things wrong with them and will not commit. I understand if she is fearful of moving, but why does she always complain about everything I do ?