I lucked out and found a great deal on a 12 cf commercial fridge on CL, and purchased a controller from ebay. Works like a charm, and I can get it down to 33 degrees, which is also beneficial for cold crashing. Prior to this, I did the bucket and frozen water bottles during those warmer months.
"A fine beer may be judged with only one sip, but it's better to be thoroughly sure." -Czech Proverb