I don't want to turn you off of trying it, it sounds like a lot of people have had success, but I tried for a couple of years to get cascade, hallertauer and nugget to grow in seperate 15 or 20 gallon galvanized trash cans. I cut holes in the bottom for drainage and ground weep holes in the sides and watered regularly but conservatively. The cascades started the year off well but ended up losing vigor. All of them got yellowish spots on the leaves that I at times attributed to nutrient deficiencies and disease. Last year I split off half of each plant and planted it in the ground and they did great -- no discoloration and no fussing. I used good soil in the cans. May be the zinc had something to do with it, although it does not look corroded at all inside. I fertilized from time to time, so I don't think they were starved for nutrients. The root mass becomes pretty large, so for a while I thought may be they just don't like being confined. Any way that was my experience... I planted the remaining rhizomes in the ground a week ago.
If you are limited in space or don't have a better option, then there's nothing to lose. I'm usually good with plants, but may be I just had bad luck with these ones.