I built myself a stand that holds six ukes very nicely, using PVC pipe. It took me about an hour to make, and cost about $14 in materials. There are no special skills required. I don't claim credit for the idea, as I copied that from a rack I saw on the internet that was made for multiple guitars. The rack weighs virtually nothing, and yet is strong and sturdy.
I have no plans, and no measurements, and I used none. I just sized it to best fit my ukes. I have used it to hold, all at once, a soprano, two concerts and two tenors. Let me see if I can find the photos....
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