one more thing id like to add to this...ask your scrap yard if they will sell you oxygen...my yard will let me trade out oxygen bottles with them..i can get a full tank from them for around 15 dollars.. it is around 35 at the welding supply store..

these prices are from over a year ago so they may have inflated a bit...there is only a 1 dollar difference between short and long iron around here so i wont cut steel for 1 dollar a hundred...i only use my torch to hack things down to manageable size, so my fuel lasts a lot longer than it used to..