Regebro,
It doesn't take a woodshop to do this stuff. A hammer, a drill, and a handsaw are sufficient. If you plan your casing before buying your plywood, melamine, or whatever, just have the store cut it for you. Most places like Lowe's of Home Depot or even regular lumber yards will make your cuts for 25 cents a cut. Then its just glue and screws for the rest of it, with maybe a little 1x2 bracing or use for rack rails.
Its not rocket science, and it is definitely cheaper than pre-manufactured racks.
Darryl.....