I finally found a 250 gallon propane tank for my first RF build. Going to pick it up Monday and will remove old valves to fill with water. I have 1 bottle of Dawn dish soap and 5 lbs of TSP (Trisodium Phosphates) to add in with water. The smoker will be on a trailer, have double doors, and double racks. Here is the Feldon link for my build Link to BBQ Pit Calculator