Manual Spinning Art Mechanism

I'm looking for a skilled engineer to help to resolve a mechanism solution. Requirements: - The mechanism should be sturdy and reliable, designed to hold an MDF frame of 800mm diameter. - It needs to be manually operated, allowing easy rotation of the artwork... (Budget: £20 - £250 GBP, Jobs: 3D Design, 3D Modelling, CAD / SolidWorks, CAD/CAM, Furniture Design, Mechanical Design, Mechanical Engineering, Product Design, Prototyping, Solidworks)