Wood just seemed kind of archaic and heavy to me.
Guessing on numbers here but
Gluvit 40-60?
15-20' Aluminum C or T channel 50-120?
Carpet and plywood 50-100?
Misc. hardware (hinges, staples, screws, bolts, nuts, washers, etc) 15-40?
You can really build these things however you want; cheap, quick, clean, comfortable, etc