Here’s a neat instructable by user sensoryhouse on building a rolling peg board tool cart instead of buying an expensive tool chest. This way all your tools are visible, and you can still roll them out of the way when need be. He uses scrap metal to weld together the frame that holds the peg board. He welds the casters right onto the bottom of the frame, but I’d recommend welding an attachment plate and affixing them with fasteners in case one goes bad. As this is a beginning welding tutorial as well, don’t forget to wear proper safety gear (including long sleeves and a high collar to prevent a sunburn)!