Thank you very much for your answer. I really appreciate it
I have a few more questions, if you don't mind
Your input on using a belt drive mechanism is very nice. That's the way we will implement it now.
I'm thinking of making something like this:

Actually this is an art installation with many such "movable" pieces, and hence the concern for power efficiency. I don't want 10-20 odd motors spinning all time, just to keep the parts hanging.
Could you suggest a work-around for this?
Also, I'm not sure how to do the math, if my motor can lift the 1kg weight at the desired speed. Any inputs on this is also deeply appreciated.
It is also possible to add counterweights to belts and chains to reduce needed torque and hold position with power off.
Didn't really get this. Could you please elaborate?