materials

Does anybody know how to get affordable but still safe cages and if not does anyone know a good place to get safe Lumber and stainless steel wire?

I am looking into building an outdoor aviary for a blue and yellow macaw but I've got a few questions: Is 3x3 meters big enough for only one macaw? And how high? Is it save to use netting for the roof? something like this: https://larajoseph.files.wordpress.com/2009/06/aviary-photo-1.jpg And...