Big *** fan

In Iraq I fabricated more than one swamp cooler, they are super easy to make and its crazy how much sqft they can cool down. I used tin A/C ducting, whatever heavy duty fans/motors I could get ahold of(even used a garbage disposal), for the water evap I used pallet wood with strips of cardboard honeycomb stapled to it, and just mre boxes lined with trash bags for the tank. The commercial ones have systems that pump water to the top and it trickles down the evap medium, but too keep it simple I would just leave a water bottle cut in half in the water tank. every 45min or so just pour some water across the top and saturate it. it won't be chilly, but it def changes a miserable hot shop into something much more bearable