Hi Jordan, a lot of people start off with a 44, trouble is they don`t last long. I think their life can probably be extended by bolting a sacrificial anode inside it. A better solution would be to look out for an old hot water cylinder, some of these are steel with stove enameled (glass) lining, others are made of copper. If you are really lucky you might find a stainless steel unit. I have also seen a lot of people use large propane/LPG bottles, most of these are galvanized and should give years of service.
Bob