Very good points Sarah... I really appreciate your help.
ACCESS: The apartment is located upstairs, so there is just one front door to the sidewalk and a stairway to the (let´s call it) first floor. At the end of the stairs there is a small hall (once in the first floor) with three doors. One door to the left goes to my kitchen (*), one straight ahead one goes to the guesthouse and the other to the right goes to where I live.
(*) this is the Gordian Knot to untie. I need to go through the hall to reach and leave my kitchen. So, I could find someone going in and out of the guesthouse
GESTHOUSE (let´s call it this way):
The door mentioned above goes to a lounge/dining room with an integrated kitchen and access to half a bathroom (no shower). So, guests can cook something light and stay there privately, next door to me, who will be available as a landlord for help.
There is a second stairway to a second floor where the guests reach a distribution hall again, with four doors. Bedroom 1, bathroom, bedroom 2, terrace. The terrace is big and have a garden and the shadow of the big street trees. And to finish, there is a barbecue room (yes, barbecue is really something in Argentina) with all you need to make barbecue and use it as a living room.
UNRELATED GUESTS: I like your point, especially if I can offer the whole place as a private apartment. The idea of unrelated guests would apply only if I have no option but to offer private rooms instead of a whole unit
Regards,
Fernando