Zero Turn Mower Lift Design

I'm looking for an experienced mechanical engineer to create a detailed design of a lift for my zero turn mower with a 150 lbs capacity. The design should focus on weight capacity and stability, crucial for a safe and effective lift. Notably, the lift must elevate to a maximum reach of 6 feet. I'm only interested in the mechanical aspects of the design; no hydraulics or electric components are needed. I would look favorably upon designs that consider adjustable height for versatility. Please submit your applications with relevant experience and a rough project timeline.