[RKDinOKC]

You could build a hefty frame with wheels to strattle the hole and will roll over the lift. Raise the lift, attach the top of the lift to the frame. Lower the lift, effectively raising the bottom of the lift. Move the contraption over the hole. Raise the lift, lowering the bottom of the lift into the hole. Detach the top of the lift from the frame. Lower the lift thereby installing it in the hole.This would be using the lift to lift the lift. You could keep the frame in case you wanted to take the lift out of the hole in the future.

You could sell the plans to other portable lift owners, or maybe rent it out. Maybe you could sell the design to the lift company to sell as an accessory for the lift. The Lift Caddy™.