She definitely needs blood thinners, as cholesterol that high would lead to thick blood and that's not good. So turmeric and ginger is a great plan.
And because this level of cholesterol really puts her kidneys at risk, I would consider taking Lipator. Sometimes pharmeceuticals are unavoidable, and this is one that actually does what it is supposed to do with few side effects, *so long as the liver is kept clean*. I know it's a tough idea to handle but destroyed kidneys is even tougher. :(