The circuit box is on the back wall of the house at the basement level.
I think it would be rather easy to snake wires (attic access is also
quite easy, though dusty).
I was hoping that since there is already a light switch located at the
door way for interior lights that he could tap off that power for the
exterior ones (possibily).
I didn't think about the requirement for additional breakers. I do
have some spares already in the box for expansion.

The idea about christmas lights is a good one!
I would like to add an outlet in the carport.
I will have to keep that in mind!