Yeah, I'm in CA, so I wouldn't have to worry about it getting cold enough for the waterlines to freeze. Still, I wouldn't want the temp to fluctuate too much. If I can find a shed in good shape I figure I could insulate it, run an extension cord out, add a small room heater, and maybe a swamp cooler for the summer. I suppose I could even install a thermostat to control it all, but I don't have any experience with those.
Maybe I'll just end up putting them all in the laundry room. I'll probably start there and see how it goes. I can always move them if the smell becomes a problem, but it may not be. I just started using pine pellet bedding and so far I'm really impressed with the odor control.