Many people think the fenced donkeys above the village are provided water. They are not. And that's okay.
There is water for donkeys all the way from here up to the Mamalahoa Highway. There are streams and oases.
Donkeys get most of their water from the grasses they eat, even the dried ones. Their digestive systems are especially good at extracting nutrition and water from what looks to us like poor feed.
More water would be good, though, as those streams and oases are pretty dried up. When water is available they will drink gallons and gallons at a time. Remember their native habitat is desert.
But providing water for them at the outskirts of your property will simply lead them to make a nice donkey path to your property and from there, your neighborhood. Let's not do that.