How To Treat Dementia And Short Term Memory Loss In An Elderly Person?

Background: My mother in law had a mild stroke. She is 84 yo. She had some slight damage to the right side of brain and frontal lobe. She has movement on her left side. She also has some dymensia and short term memory loss.She wants to go back to her home, so were getting some paid help to assist.Question, what do we need to do next, to keep her from a nursing home. What do I need to prepare next...