First off I decided to build this because i was tired of carrying my precious Les Paul around in a stupid gigbag afraid that I would run it into a wall or something and crack the headstock. So I built a heavy duty plywood guitar case that would hopefully protect my guitar in the case of me slamming it against something.
Plywood screws nails glue mod podge (a type of glue mostly used for collages) i found some at walmart hot glue staples styrofoam (either contractor boards or great stuff) fabric newspaper hinges latches metal corners handle cardboard
I was able to find most of these supplies at a new home build up the street. Contractors throw away EVERYTHING.