J. Kelly McCoy’s Homemade hot tub project has every thing that I look for in a project for this site. A true home built project that not to many people would have even attempted. J. Kelly started off with some parts from eBay and a dream. He took a huge plastic livestock tub and turned it in to a full working hot tub and kids pool. The tub includes a pump, heater, ozone generator and miles of plumbing. The hot tub is surrounded by a deck which hides the plumbing and mechanical for the hot tub. The total project only costed ~$1200.
Read… (Update for 2013: this link appears to be a dead end- sorry)