I am using a homemade rack, 1 1/2" metal square stock for the main structure and 1" square stock for the shelving. The biggest difference of homemade racks is the materials use for the shelving. I have tried wood, acrylic, and glass. Glass has been my choice of platform on top of acrylic. The thickness of any material will also make a difference to the sound quality as well. Experiment and have fun.
I do agree if materials are not available to you, It's well worth the $$$ to buy a real rack!
I do agree if materials are not available to you, It's well worth the $$$ to buy a real rack!