Fence post VAWT made with duct tape, cardboard, bucket lids and paint stirring sticks. Cost less than $20 even if you don't have parts lying around. The bearings are PVC pipe fittings. Model is quiet, noiseless and weighs less than ten pounds. Any noise you hear is just the wind blowing across the camera microphone.
This home made vertical axis wind turbine surprised me by surviving the night in what was supposed to be destructive testing. Since then I put large washers on the airfoils and painted the wooden parts black.