OK I will re-phrase.... We have built similar walls in the past using approved plans from Architects/Engineers. New laws around us require that any walls over 4' require a permit process. Not saying all projects are the same but using proper construction methods and permits we have had these approved in the past and I have no doubt this one will be approved.
I do get what your saying from a design stand point it may seem a little small as well. I was looking to keep it minimal only to break up having a full 7' wall.
Truck, Mower, Trimmer, Blower.....same as everyone else.