I live in Panama and most people cook over fire, for larger meals anyway.
This is a great idea, maybe a little fancy for here LOL
In Nicaragua they cook over a similar design but twice the width and has a metal plate on top that traps the heat and smoke when a pot is over the hole and the smoke is plumed out of the house. Solid cement and to heavey to put in my car so I didn't buy 1, but will make 1 some day myself.
following for more, Thanks