technically a no-frost freezer could work, but the temp fluctuations are a potential problem.
cannatrol isn't a freeze dryer.
if you want something for curing.. look into "Thermoelectric" wine coolers...
it is important it is a thermoelectric type and not one with a condenser.
you may need to seal them up a little better and you'll have to put enough 67-gram 2-way humidity packs to maintain the RH% relative to mass of bud inside. BUT, it'll be 1/3rd theh price of a cannatrol... and as you look around you'll realize the cannatrol is just a modified wine cooler for 00 BWAHAHAHAH they are making about 500-1000% profit margin on that thing.