Follow-up on this story.
Sometime in May my mom got my grandmother moved into a memory care facility close enough to visit her several times per week, and though my idiot cousin fought it tooth and nail, my mom eventually got herself established as guardian in August. Initially my grandmother actually seemed to improve as a result of the regular activity and social interaction. She always seemed to know who I was, as well as both my parents, though it seemed every time she met my wife and kids it was the first time. She did have some drama surrounding a lady that initially started out as her "best friend" and then it got weird when my grandmother became convinced that this lady was HER mother, who actually dead bear a striking resemblance but has been dead since the early 70s. Alzheimers is weird, man.
My mom proceeded to make the legal moves to get the houses put back in my grandmothers name to make sure she had enough assets to pay for the level of care she needed, for the rest of her life. She was after all, in reasonably good condition for 83 so we expected she could have years, even half a decade. The attorney that ended up needing 4x as much money as he estimated just for the guardianship didn't really seem hungry enough to be aggressive, and somewhere in the process the judge they'd been dealing with retired or something and a new judge came in that had no experience in this area. Since then things were really slow. Cousin was dragging his feet on providing things he was court ordered to provide (like medical and financial records, access to my grandmothers house, etc), his attorney at times even admitted to not even "bothering him with that right now". Typical of everybody my uncle ever surrounded him with.
In December my grandmothers health took a seemingly random turn for the worse. Was increasingly agitated, in and out of the hospital for various things, then around the 3rd or 4th of January she was transported to the hospital and was never again seen in full consciousness. After a couple of days in the hospital, she went back to the memory care facility with hospice and she passed away last week with heart and kidney failure.
Like I said from the beginning, the legal measures were always about making sure she was taken care of, and we're not interested in challenging the bogus will my uncle made. The money involved is definitely not insignificant; it could definitely do some things for us but to spend years and tens of thousands on attorney and legal fees for an unknown outcome doesn't seem worth it. We're looking at the last 7 months as a blessing that we got to spend some more time with her, rather than her living out the last 3 years of her life in isolation as my uncles prisoner. My cousins will get all of it, and will most assuredly be broke again within 12 months, but I'll never know because I have no desire to have anything to do with either of them ever again. Good riddance.
I'm glad you got to spend the time with your grandmother, brother. You and your mother reaped a reward that far exceeds any monetary inheritance. I'm sorry for the loss you and your family suffered.