Mom in senior living center, with hired care giver, is it time for nursing home

A fellow caregiver asked...

My mother has lived in the independent side of a senior living center for over 2 years, she has alzheimers. We ended up having to hire a care giver to help her to meals, give her medications, get her dressed, showers and a few other things. That was going well, but now the office staff has been encouraging us to move mom over to the assisted side. She is getting worse, and when she gets sick with UTI's and Broncitus turning into mild phnemonia she has problems walking. Our concern is: even though she has a caregiver, the caregiver is not there 24hrs a day (5:30am - 7am, 11am-12:30pm, 5:pm-6:30pm, 8:30pm-9:pm) and night time is our biggest concern. We are afraid she will fall and no one will know till the next morning. She will not wear her alarm and don't think she will remember to push the button anyway. We have thought about moving her to the assisted side of this facility, but from what we have seen and heard from people who have their parents there, they don't get much more care than what our mother has now. So my question is: would it be best to move our mom to a nursing home? Very undecided on the right thing to do!!! Don't want to make the wrong decision. How do you know what you should do. When do you know when the right time to move them to a nursing home. Do you keep her independent and hire a 24 hour caregivers or do move them into a nursing home? My brothers and I do what we can do, but we cannot be there 24hr a day.