Q.how much watering do elephant ears need
How would you water them and how much watering does it take for elephant ears?

Large elephant ears planted in the sun in a container will take a lot more water than a smaller one planted in the shade in the ground.
Size, location and exposure are all factors in watering any plant. We water elephant ears with 1 large bulb and 3-5 smaller bulbs sitting in a 50% shaded location, planted in 3 gallon containers once or twice a week, depending on temperature and wind. I always water till it 'pees'.