I had an Ikea loft bed for ages and cut the bed part down to normal waist hight and then was left with the bottom legs/cross-braces . A trip to Lowes and about $100 got me a nice piece of 4'x8' birch plywood, some 1"x4" pieces of whitewood, screws, and some stain.
After a day with a jigsaw, circular saw, drill, and sander I had a platform that provides a lot of work surface area, has an audio mixer and audio outboard built in and keeps all the cables hidden from view.
If people are looking for a workspace I would always suggest trying to build your own. You get exactly what you want for a small sum of money, and a fun project to work on!