I need to get a water heater very quickly, and it's just for water. Every night and day it is below freezing now, and other Wisconsinites will understand. So I'd preferably want one with a slimmer cord so I can stick it through the ventilation slot so it wouldn't make more areas for wind to pass through, like if I opened the nesting box and put the cord there, it would freeze up the coop! So I'd like something between good quality, and inexpensive. Any advice/suggestions are helpful! Thanks in advance!