Like i said I'm no expert on humidors.

I made a assumption based on the digital and the appearance of the humidor.

I still don't think it is a good humidor to start out with, but then again i don't know how stable the humidity and temperature is in his home.
The owner that took the picture may live somewhere that it would be perfect, but would it work as well for some one let say that lived in Arizona or Alaska?

Air circulation is one thing leaving the door open 24/7 is a different matter.
If some one opened up your Humidor and left it open what would you do?
With large air gaps i just don't see how it will be possible to stabilize the RH.