Another way to hang it is to buy a packet of teacup-hooks that screw in, and space them a foot apart around the perimiter of the area where you want your net. You can then unhook the net with no tools.

Netting is sold at garden centers as 'deer netting' or 'bird netting'. I've seen it in the garden center at home dePOT too. It's around $4 a package.