pb4uski
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
That is where the irrevocable trust comes in. You give all but 5 years expenses to the ir- trust. When the 5 years are up the person is out of $ and the ir-trust funding is beyond the 5 year look back. So the person has little to no assets and the ir-trust is well funded. The ir-trust has beneficiaries that do not include the grantor.
Seems to me like a poor trade.
The irrevocable trust only wins if the OP's 90 yo mother needs more than 5 years of nursing home care and then the benefit is the cost of any nursing home care after 5 years being "free".... but only if the value of the :free" nursing home care exceeds the loss of the tax benefit of stepped up basis which is 100% likely (unless Congress makes some change).
I'd go with the revocable trust since the stepped up basis is much more likely than the OP's mom needing more than 5 years of nursing home care.