im planning on using either 1.5" or 2"pvc and maybe stiffening it with round wood poles on the inside of the pvc
I thought about doing this as well, however for wallet relief i thought i'd get .75" dowels and 1" pvc. i had also thought about drilling pin holes and use some bolts and wing nuts to secure the corners.
I figured the extra support from the dowel would offfset the need for thicker pvc. I don't think I'd try it on a 9 x 16 screen, however a smaller screen it could work well. With it pinned together all you would need is weights for the base, or weights to keep it from swinging after hanging it.
Thinks Carls hanging frame, byt style. on the cheap.