I built a 15' x 35' dog kennel with 5ft chain link a few years back.
Made up some form boards and poured a 12" wide concrete beam around the perimeter and set my posts in the concrete, thinking that the dog couldn't dig out that way.
My male lab pissed on the posts and they started rusting at the base where they meet the concrete.
I bought my chain link and posts at Lowe's, didn't really look around at other suppliers.
Lowe's may be a lower cost than a lot of places, but I think their material is a lower quality.
Shop around and take a good look at the quality of material.
Be careful when stretching it, you can over do it and the diamond pattern will look "off".
