Cantilevered trellis

We are discussing the possibility of installing trellis at the entrance at one of the parks.   We thought of two rows of column;  however a contractor who has been helping build trellis for the local govt suggested we use cantilevered trellis.  It can be useful when building trellis when there are trees all ready.  It is has cleaner airy look, and comes out to be cheaper.

However, it could like a waiting shed without proper design.


What do you think?