I have to ferment in a frig in a detached, unheated garage. I have a mid-size frig working with a dual stage Ranco and all is good EXCEPT I can only fit one batch at a time. I want to pick up a used frig/frzr that can handle two carboys at a time. The frig/frzr would sit right next to my brew kitchen countertop so no long trips carrying full bottles. I can handle full better bottles coming out of a chest frzr if needed. Which would you recommend - frig/chest frzr/upright frzr? Most people only state the outside dimensions when selling used. What minimum outside dimensions should I be looking for before making a trip to verify it will handle two carboys? Thanks.