I've made a few batches of beer so far, but I'm sick of waiting several months for my beer to condition in bottles. I've heard that that it only takes a week to properly condition beer when it's put into a keg, and I've been thinking of buying a 19L keg, CO2 bottle, regulator and tap so I can have my own beer on tap at home. What is the easiest and cheapest way of building up a half decent keg setup? I've had a look at homebrew shops but they all charge an arm and a leg for such a setup, so I'd rather build one myself. I don't care if it doesn't look good, as long as it works fine without any leaks I'll be happy.