Living alone, any input?

You really can't reason with a person who has dementia or get them to understand. The part of the brain that processes is often not working, so, they are just not capable of realizing that her belief about how she can live independently is magical thinking. My LO was the same way. My LO's doctor told her that she had to have AL. It wasn't up for discussion. I explained that she needed it for rehab, getting her medication adjusted, nutrition on track, etc. She went along with it.

I'd figure out what care she needs and make the arrangements. Do you have POA?

Exactly the advice I would have given! Geaton, you handled your mom perfectly...

Your first responsibility is to be there 100% for your husband. You mother now needs more care than you can give her. And her unrealistic imaginings are probably the result of dementia or cognitive decline, so you won't really be able to reason with her about her future care, so just decide what YOU really want. My MIL has been in a LTC since 2016 and decided to never get out of bed. When we visit she asks when can she go back home (her house was foreclosed in 2018). We tell her as soon as she is able to get out of bed and walk and take care of herself and she always insists she can do that, then we say, "Ok, let's see you get out of bed." End of conversation and argument.

Transition your mom into a care community where she can be in assisted living (if she's able) or LTC. It doesn't mean you don't love her or care about her. It just means you are being realistic and wise. Help her apply for Medicaid if she doesn't have the financial means. At 73 you need to take care of yourself, especially since you are already caring for your hubby. I wish you peace in your heart as you think about this option.