I would like to build a man lift/elevator with a 1000lbs capacity.

I have been looking for a used palette lift but haven't seen one locally for over a year. Shipping is cost prohibitive.

The attic opening is 4x6' and the total lift height needs to be 9'

The platform should also fold to save space when not in use.

I was thinking of hydraulic or worm gear type or even a winch with pulleys.

Open to suggestions!

What size/type and thickness of steel should I use?