Building doesnt have to be expensive. It just takes some patience and it doesnt hurt yo be of the "hebrew persuasion"
I found an incomplete kegrator on Craigslist for $25
(The day after, I saw a complete one with co2 tank for free! DOH!)
Bought a 20# co2 tank that had been used to ferment wine for $20. Took off the valve and cleaned it. Took a couple hours. Then took it in and got it exchanged for a full for one for $12
Waiting on some new lines and a tray off of beverage factor y
All in all, including the external digital temp display and the lock hasps and matching lock set as well as a thermostat setup I desgined myself, the thing will be a little over $200 after all is said and done