[Porsche-O-Phile]

Went through this recently - you want irrevocable. That puts enough legal "distance" between you and your assets where a challenger (nursing home or Medicaid) can't claim that you have actual control of those assets. If they can successfully make the case that you can / do control the assets, those assets become subject to seizure to pay for care. Nursing homes can and will wipe out your estate, then kick you onto Medicare at which point you're likely to be shoved into a substandard nursing home.

Even with an irrevocable trust you have controls (you can appoint, hire and fire trustees). You also control your will, beneficiaries, etc. definitely talk to a lawyer.