Hi Ya'll, I am lookin for some guidance on building my first smoker. I have a tank from a water heater(30 gal lowboy) for the firebox. My main question is, what to use for a cooking chamber? I am on a fixed income, so finding something from salvage would be ideal, but what to look for? I have some old residential refrigerators, but a welder friend of mine says the metal may not hold up to the heat. Currently, buying enough 1/4 inch steel to build a cook chamber is financially not possible. I want this thing to last a while. Any ideas/ suggestions welcome!