Are you using treated wood posts? They wil work fine for the electrobraid, but are a little far apart for mesh. Unless you buy a fairly heavy gauge mesh, like that shown in the photo, it will sag if the posts are too far apart. I have similar mesh around my back yard with 4-5" posts 12' apart, and it still sags a bit.
The mesh is quite expensive and challenging to work with in long stretches, as it is hard to keep tight. The ground also needs to be level for it to sit well. You will likely find it costs less and serves just as well to put in more substantial posts and multiple strands of rope.