All of the really good guns require some serious pumping or SCBA (NOT scuba) air supply.
SCBA air supply set-up costs as much as the gun, but few seconds and one is back up to pressure!
I know nothing about the most modern deer hunting versions. I just got done watching a video that starts with the "low cost" swedish hand pump for over $300. Then there's this good video promo on this guys Benjamin with 75 yard range.
