J.W.
What you are talking about is beyond wills and trusts. I believe what you are talking about is Medicaid planning. Depending on what you are put in a nursing home for it cost about 4 to 7 thousand a month. Yes, that will deplete savings pretty damn quick but nursing homes aren't free.
Medicaid planning is not without risks it pretty much means handing over everything to your children and hope one of them isn't greedy. Medicaid has a five year lookback so if she went in a home before five years they will come back and take all the assets.
Thing is we looked into it for my dad when my mom was alive because she had Alzheimers. In that case it could have wiped out all my dad's assets as well leaving him to live the rest of his life with nothing. In your case it is a matter of wiping out her assets before Medicaid takes over since there is no surviving spouse to worry about.
Another thing to consider is it doesn't work with a million. Pretty much you will have to wipe out most of it anyway. At least this was the problem we had with my dad so we never went ahead with it. Then again we didn't have the luxury of waiting five years so again you are different.
Oh this is beyond a lawyer who deals with wills and trusts. If your attorney doesn't refer you to an elder law attorney I wouldn't trust your attorney. This is very complicated law that only an attorney specializing in elder law understands.