Back in my college days we had something like this in or apartment
I assume this is what you're talking about?
This one has a lock so you can make it spin or not. I'm not 100% sure how that works without having one in front of me.
If you look at the Amazon page, you can get a good idea of what parts they're using, and how big they are.
I think if you made 2 identical bases with bearings in them like the 15" diameter one in the link, 2 of those shearing shafts, and some of the different lengths of pole it could work. It would just be one that only spins and doesn't lock.
It's all metal fabrication though, so your cost might get high.
I got mines from amazon it was only $93 which is the cheapest ur gonna get and it works perfect! amazon pole