As you have noticed significant deterioration, I think I would strike while the iron is hot and move her to this care home. If you decide it isn't quite right, you can always move her to one of the preferred CHs later. Obviously it is better to only move her once, but the priority is that you know she's safe and has help 24/7. And even if we move our PWD to the care home which is no.1 on our list, we never know if it will work out anyway. As you say, she has lost her sense of time and is becoming disorientated and lonely - being in a CH does tend to smooth that out because there is always someone there to prompt and reassure.