This is such a good idea! I've built a couple of similar cubbies for outdoor use--one for all of the spray nozzles near the garden hose and one in the carport for our grandsons' sidewalk chalk and bug-catching gear. Great to have what you need close at hand!!
Love this blog,found it a year or so ago and did this system to span a large area on our back porch. Used Painters drop cloths with hanging clips for curtains with a chain sewn in the bottom hem for weight!