Advice please??? Think mom only has few years left!?

I am very sorry about the difficulties you and your family face. I would suggest you speak to a lawyer and find out if its possible to get your mother declared as unable to make logical and intelligent decisions for herself and therefore she could be made a ward of court or somebody trustworthy be placed as her guardian. You would also probably need a medical certificate from her doctor saying she is mentally incompetent. When a person reaches the stage your Mom has reached, sadly, they are unable to think clearly and therefore its legally possible to have somebody, usually a family member, appointed to act for her in her best interest. The TIAs you mentioned have a way of robbing a person of their mind. My Mom reached that stage for a few weeks before she died, and so I know how it feels for the whole family.