I have a Haier CPF10XCL-LW 10,000 BTU Portable Air Conditioner I use to cool my garage. I found a refurbished unit for $179 at newer.com. it works very well, it does require an exhaust connection. It comes with a window adapter, however I installed the vent in my garage door.
Amazon and Costco has them on sale, but Newegg sells refurbished units, mine appeared to be new and worked fine.
https://www.newegg.com/Product/ProductList.aspx?Submit=ENE&IsNodeId=1&N=100012429%20600047763