Looking at the pump you mentioned, it looks quite simple to operate:
Legacy Food emergency hand pump
It says: "No Assembly Required- Take it out of the box and put it in the well. (May need to adjust pipe length for optimal performance)"
"Our pump is so easy to use that even kids can pump and get water to flow."
All the pictures on their website show it being using in a raised well casing. Can you remove the top part of the pump to use the body as a clamping device for the unit?
For $310 though, did you want to just use it once to check the quality of the water or have it as a backup also?
Seems like there would be a much cheaper way extract some water if that's all your looking for. A shop vac with a small hose adapter, a drill operated in-line pump etc.
Did a quick search and there is lots of information on repairing pumps if you choose to go down that path if your water turns out to be good. Good luck!
Rebuilding a Pitcher Pump