I have pretty much decided to start with a 1-gallon equipment kit since I don't want to invest a lot into something I have never done before. I will surely start with a 1-gallon wine kit to start. I have noticed that the number 1-gallon selection of concentrates are few. Would there be a problem buying a 6-gallon wine kit and splitting it up in 1-gallon batches? Would the unused juice go bad between batches? Thanks.