This bed is so perfect for my studio apartment. I don't have the floor space for multiple dressers, and the modular 3 bench design made it super easy to move in (and hopefully to move back out when school is over). LOVE LOVE LOVE this project.
I also made the headboard.
It is a single sheet of plywood, cut down and covered with polyfill and fabric. We predirlled holes for the buttons, and I set the headboard (fabric side up) across 2 saw horses with a flashlight underneath so I could see the drilled holes. I used nylon thread and a large needle to attach the buttons. There are flat buttons on the backsides of the holes so the thread doesn't slide through. It is hung directly on the wall behind the bed via wire hooks - make sure you hang it from the studs!
We used sheetrock mud to fill in holes and divets since we used cheap plywood.
We crafted our own drawers as well - they ended up being 18 deep x 24 long x 10 tall. We used premade metal drawer slide kits from Lowe's.
Use an air nail gun if you have access to one. My very number one recommendation for this project! Makes your life so much easier.