Will having my assets in a living trust avoid challenges by my beneficiaries or heirs?

It may be alleged that a “living trust” is invalid because the Grantor was incompetent at the time of establishing the trust or was unduly influenced by some person to establish the trust in a particular manner.  Further, although the time period for challenging the validity of a will can be limited to four months, there may be a much longer time period under which the validity of a “living trust” can be challenged.  The cost of defending the validity of a will, where the executor acts in good faith, is payable from the probate estate.  It is not clear under Ohio law whether similar expenses in defending the validity of a “living trust” would be borne by the trust assets or by the trustee personally.