If you remove the tires you can droop test in your driveway/ garage with simple jackstands. They might need to be elevated a bit but still doable. if you dont remove the tires you would need a real vehicle lift. Just allows the axle to drop that much further without anything hitting the ground and stopping the droop. I have a crap load of sandbags i use for work so i load a few on the axle assembly to simulate tire weight.
-insert meaningless out-of-place political diatribe-