Sitting here on a grey, cold day with snow flurries in northern Minnesota, allow me to express my .... envy....?? ;-)
I had plans long ago after graduate school of working at the Univ. Guanajuato (in Irapuato..?), -- just didn't work out, but seemed like a great location. Looks like a great opportunity to try the full roof-top regime of composting, water harvest, food production, and yield analysis. It will be interesting to see what grows well in your containers and under that microclimate. I would be curious if frost still visits the rooftop (how many stories above the ground?) the same way it does at ground level where you are at. Of
course maize is so legendary to the region,.....do you think you might be able to give that a stab either for fresh eating, flour, or popped? Might vining beans or squash be trellised in some way that would provide acceptable yield without using too much space? Anyway, nice looking start to your time there....Looks like fun!
PS: With my love of power equipment, you will forgive me for zooming in on the white Mitsubishi pick-up truck ( :-) ) .... a nice looking vehicle that we likely can't buy here in the States.... (sigh..)