I am a Spanish Teacher for Foreigners myself. But I live in Palermo, one block from Jardín Botánico and with good transportation to San Telmo. I write just in case you don´t mind coming to this area.
Good luck finding the ideal tutor.
hi there. i am currently giving spanish and english lessons. i am anglo argentine and fully bilingual to mother tongue standard. feel free to email me and we can discuss if you haven't already found someone! firstname.lastname@example.org