1. For a normal 30kg or higher doll, you’d have to do some imaginative hoisting and maybe get a wheelchair or any chair with wheels to move her around.
Take advantage of physics and lift her in 10-15lbs segments with proper leveraging, walls etc. Lift a leg here, move her back forward this way, roll her that way, etc.
2. A silicone or TPE doll would maybe work with a rail and lift.
The doll would even be easier to handle than a 30lb TPE doll without a hook if she stays on the rail/couch/bed.