For me the watering came out of the end of a watering can, instead of a hose. This actually has me using less water overall than a bedded garden. Hauling the water at the time seemed like more....but it was really less.
It proved an interesting concept in the long run.
another way to water, especially if you have a number of upside down pots, is to order a hanging basket watering wand. This is what nurseries use, if they don’t have automatic overhead irrigation.
Simply google that term and you will find loads of them.
I understand, and if it works for you...terrific. For me, well-mulched raised beds are a lot less work-intensive and they produce a LOT.