So you want to escape the heat in the privacy of your own backyard, but you dont have a pool OR the 40 thousand dollars to get one? This guy and many others have discovered how you can make a small pool out of a livestock stock tank, which is essentially you lounging around in a cows water bowl!
Livestock Tank 8'x2' - available at most farm supply stores for $400-$500
Filter Pump - available at pool supply store or online. $100-600
Inlet Fitting - Out of stock online but my DIY option can be made from hardware store items $10-20
Optional Vacuum Manifold/ with Hose and Nozzle - Available at most hardware stores $40-$60