Yeah unfortunately those misters/fan cost a lot. But if you are going to try to increase humidity in a garden that is the way to go. I realized though that when members commented too much water, that the idea for evaporative cooling is to be used inside a room or indoors, then yeah misting fans will be too wet. So Evaporative cooling is the way to go. However if outdoors then maybe those misting fans or heck just buy fine misters instead. I have a misting system that is sold for misting a tent during summer, but I have not yet installed it because all my hoses to the balcony garden leak
TTFN
Arvin