It could cost you between $300 to $600 worth of materials, a few hours of labor, and some basic DIY skills to make your own kegerator. This figure varies depending on the materials you already have, the cost of resold items, and your location. Homebrewers have been customizing tiny refrigerators and freezers for years to create the at-home bar of their dreams for a lower cost.
Aside from this, a kegerator with draft towers normally requires one to two beer lines as well. You will need around 8 feet (from the top of the keg to the faucet tap) if you want to use a 3/16-inch inner diameter beer line for dispensing a keg at 10 PSI of pressure. Beer lines usually come in either ⅜-inch inner diameters or 3/16-inch inner diameters. ⅜-inch lines give a better flow rate with lower pressure requirements.
The best and most common places to buy kegerator parts include kegkits.com, Amazon, Kegconnection.com, CHI Company, Kegworks, and Micromatic.