My kids received a badminton set from their grandmother last summer which we have enjoyed immensely and play it often especially as an after dinner family game. The problem is that it is cumbersome to set up and take down for mowing the grass and the kids keep tripping over the guy wires when running through the yard, especially after dark. I decided to make a PVC net holder that didn't use guy wires to hold it up.
UPDATE: After 3 years of sitting out in the sun and rain the vinyl headband on my cheap net disintegrated. I tried a higher quality net but it was too heavy for my thin 3/4" poles and it was difficult to find the same cheap, lightweight, polyethylene net that originally came with the badminton set I bought years ago until I called the manufacturer and they let me buy some replacements from them. You may want to try 1" poles. I'm not sure they will fit inside 1-1/4" PVC anchors so you may need to use 1-1/2" anchors. The good thing about PVC is that it is cheap so you can experiment with various sizes.