Mom's deterioration has greatly accelerated. she's lost her executive function. aid caught her pouring nail polish into her water bottle, clogging up the toilet with an unknown object that we need to call the plumber on and we routinely have to intercept her before she attempts to go down the stairs.
What this all means is that the balance between freedom and enrichment and the need for safety have greatly changed. Anytime she can't be totally watched she must be put to bed. She can't be trusted as she'll do something and now know why
Freedom and enrichment really are now being wasted on your Mom as the dementia won't allow for any of the mental, emotional and physical benefits of it. You are romanticizing and projecting your concept of her "aging in place". She will get far more socialization and exposure to activities in a good facility. She will have more eyes on her for safety. And your life won't be diminished because of hers. As a Mother, I'd never want any of my children to make that sacrifice for any reason -- I've lived a very good life and now want the same for them.
In most cases however(unless it's unpaid family members), the cost of facility care is much less expensive.