Living Revocable Trust with Incapacity clause would make sure that, when you are mentally capable, you manage your own affairs, but when you are incapacitated, your designated person will take over your affairs and manage it for you. This way, you plan beforehand who is going to take care of you when you are ill.
A trust can have more than one trustees, so potentially if you don't trust one person, you can assign more than one person as trustees of the trust in order to provide some supervision. But there is no failsafe if you don't have trustworthy person to assign.
A trust can have more than one trustees, so potentially if you don't trust one person, you can assign more than one person as trustees of the trust in order to provide some supervision. But there is no failsafe if you don't have trustworthy person to assign.