We also were curious about hydro so we got a 7 pot live well set up very easy and reasonable priced to give it a shot........
and so far its been pretty smooth labor wise it seems less, and we change water out every 3-4 days i believe, and he checks levels everyday, the grow is much quicker and requires less light.
dont quote me on the water changing but im pretty sure we both do our watering about the same time, i'm still playing in the dirt the hydro is his new baby but i do know how to check the levels and adjust if hes gone.