Any resources for free security doorbell video, walk in tub, other items when you have no Medicaid and low income and 92 yrs old?

Call your local Office of Aging they should be able to answer these questions.

I know that many people plan to die in their familiar homes, especially when they have reached their 90's, but I think that the most sensible solution is to bite the bullet and make a move to a more supportive, accessible environment. I had a chat with my mother during one of her lucid moments shortly before she passed away and she agreed.

Highly doubt you'll get much, if anything, for free.