A notary is just a notary, so I wouldn't put too much hope into that. He will only briefly explain the formal possibilities, but he will not advertise or evaluate advantages and disadvantages (e.g., from a tax or legal perspective), because he is not allowed to do so. It is a misconception that a notary somehow evaluates and reviews a contract. Our experience is that the notary doesn't care what is in the contract, as long as there are no invalid components, nasty traps, or deliberately misleading formulations. He only oversees the conclusion of the contract and the execution of the agreements by both parties.
Therefore, this is more a case for a lawyer in the field of inheritance/real estate as well as a tax advisor.