Does anyone know what gauge steel I should use for a warmer to set on my firebox. I bought a new 250 gallon smoker trailer for $800 and was wanting to put a warmer on top of firebox. I called a place that sells steel and they told me for 1/4 in steel to build a 14 inch deep by 2 foot wide by 4 foot high warmer woud be around $300 dollars even though I told them I would weld it myself thats just for the steel. Any suggestions?