1st off I am new into home-brewing. After listening to quite a few episodes of Brew Strong, I am going to take Jamil's advice and focus on fermentation temperature control before anything else. I currently use the swamp cooler method, but my wife wants it out of the house and in the garage, which will soon be way too hot considering I live in Arizona. I decided on either a refriderator or freezer, leaning towards a freezer. The freezer/fridge will be in the garage so space is not an issue.
My first question is what size freezer should a purchase? I would to like to ferment at least two carboys at once. Does a larger freezer use much more energy than a smaller one, I don't think it would cost that much to hold temperature of air (unused space). Will I really need to ferment more than two carboys at once? I would like to brew at least once a week.
My second question is what are the advantages of a chest freezer to an upright freezer or chest to upright?
Thanks for the help.