Kettlebells are a fantastic way to build wicked power and strength, but as you need heavier and heavier kettlebells, each one can set you back $100 or more. A good alternative is this DIY "kettlebell" that lets you put as much or as little weight as you want and costs a fraction of the price.
Image by .v1ctor Casale.
Check the link below to see the exact materials and what it looks like, but essentially, Ferris has fashioned together a T-bar of sorts, which is made from multiple pieces of three-quarter-inch diameter pipe nipples, a floor flange, and a T-shaped pipe to fit them all together. You then stack weight plates one by one (up to around 45kg), secure the weights with a clamp, and play.
As a side note, you probably need to wear gloves to prevent the worst callouses in the world. This thing isn't a perfect kettlebell substitution, but if you stick with the small plates, exercises like swings, sumo deadlifts, and goblet squats are entirely possible.
The Kettlebell Experiment - Bring One to Life for $US10 ($13) [Bodybuilding.com]