Leelanau,
Our local doughnut shop sales their icing buckets (3 gal)for $1. I did my part for the local economy and got one.
A lot of people will tell you that they only do large (5-6 gal) batches because it is just as easy. Although easy, I still experiment with 1 gallon batches to fine the country wines I like and then I make them in larger amounts. Yes, you only get 4-5 bottles, but you also don't have 30 bottles of a wine you don't like sitting around!
My first batch of wine was a welches red grape and I bought a 2 gallon bucket from the Dollar Store (still use it with a dish towel and a rubber band)and while it was fermenting, I drank the wine from a 4L jug I bought. Mananged to drink all the winein the 5 days it took for primary fermentation
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I think others have answered this, but converting from 1 to6 is easy. Everything is multiplied by 6 except the yeast. One package is good for 5 gallons, but I push it to 6!