We live in sub-tropical coastal QLD. As @syncretic has already suggested a pedestal is a better and less expensive investment. It will move a lot more air. They don’t consume an excessive amount of power. We still use one with a small remote. The air movement creates its own cooling effect. Better if a bedroom has openings on more than one side and the fan can be used to draw cooler outside night air into a hot room. We also have RC split system Aircons. But still use our pedestal and ceiling fans to reduce the need to run the AC’s.
Choice has a guide and reviews on portable air conditioners that do work if your budget might go that far one day. Start here, includes links to reviews of pedestal fans. Note detailed reviews are member only content. https://www.choice.com.au/home-and-living/cooling/portable-air-conditioners