I'm sorry to hear about your mother but I think you've made the best decision for your mom and your family. I'm sure it wasn't easy and you thought long and hard about it.
I'm going though my own problem with my mother right now. She's 88 and was in an accident early in November. While she was out a man who had been running tripped and fell on top of my mother bringing her down and injuring her. She has osteoporosis and as a result of her injuries got a split knee cap which is taking a long time to mend and a fractured neck which might never heal. Doctors have told her that she will probably need to wear a neck brace for the rest of her life! Because of this she needs help with the basics like dressing, bathing, housework and shopping.
This is all so very upsetting! Thank goodness her mind is clear. She lives in Florida and I'm up in Pa. My brother went down to help her for a while and after being in a rehab hospital she is back in her condo with a home health aide who lives with her. At first friends would visit but now she rarely sees anyone and she's getting lonely. I've suggested assisted living. There are some very nice places near her or she could come up here. However she's not interested.
I would even have her come live with me but our house just wouldn't work for her since it's a two story. Even if I made our family room which is on the first floor a bedroom for her one has to take several steps down to go in. It really wouldn't work and I know she wouldn't be happy here. I just don't know what the answer is. So for now she'll stay in her condo with her aide.
I do plan on taking her to visit some assisted living places when I see her over the winter just so she can see how they are. It's up to her though.
It's such a tough decision for everyone involved. I don't think you will regret it. You did what you had to do.