I would suggest buying a propane tank and just getting it filled. If I could, I'd get a 100 pound tank just to save myself some money and trips. I just filled my 20 pound tank and it cost me $15. I assume you got the Blue Rhino tank from Wal Mart? If so, I think the trade-in is much cheaper, check into it. As far as mash tun, If you don't have a brewing cart I'd suggest getting a 10 gallon Igloo cooler and converting one of those. They seem to work pretty good.