If you want to make a quick, first kilt then look at the DIY forum and find the X-Kilt instructions. Then go down to JoAnne's fabric, or Hancock Fabric, or whichever budget fabric store you have in town. Purchase some solid color cotton/polyester twill. It will cost you about $8 a yard for four and a half yards. Now you have enough fabric to make two X-Kilts unless you are a seriously large lad. If you don't like solid color, then they will probably have some camouflage material. Try that. Buy some thread.

This assumes that you have access to a sewing machine and know what to do with it.

They're not traditional kilts by any stretch of the imagination, but if it's air conditioning and freedom you want, and your budget is tight, the X-Kilt is a pretty dynamo way to go. OF course, I'm a bit prejudiced.