What Chuck H said! Mine cost the equivalent of about US$50 at the time. Stainless rules. Many texts warn against using plated or galvanized tanks, citing contamination of the job, but obviously its not universal if you guys have been doing it successfully with rain guttering!
Re: "OK Who has plans for a rusting cabinet that they'll share?"
In our dry season (very low humidity), we use a length of 100mm PVC sewer-pipe, one end capped, stood vertical capped-end down. Place a moistened wad of rag in the bottom. Then suspend the swabbed barrel-group vertically in the tube, not touching any sides, using a wire or similar, and toss a cloth over the top to keep the humidity up inside. This works in our climate, 26 to 32 centigrade daytime max, 18 to 22 overnight min.
