Built a poor boy portacool for shop. Guy I work with bought the old rooftop swamp cooler at a junk sale for $40. The rest of the stuff we scrounged up laying around. Well I did buy the lil water pump for $20ish. In pictures it’s running on an m12 battery but I put a deer feeder 12v battery on it and a battery maintainer left from when I sold my boat. Built the rolling stand for it. Built the elbow duct. Man it man a world of difference in the shop last summer.