Just thought I would put an update on this project, in case anybody has thought about going this route.
it's been just a couple weeks shy of a year now, and this freezer is almost full, it has held temp and rh great, by using a Ranco temp controller and several pounds of the silica gel litter.
BUT, the compressor on the freezer finally went out yesterday, I'm not sure if it because the temp control has it coming on more often than a freezer normaly would, I have had it set at 65 with a 2 degree swing, or if might have just been it's time to go ( I got the freezer used).
we moved into a smaller place recently, so I think it might be time to look for a more attractive way to store my smokes, I'm probably going with a wine cellar or, beverage center that is small enough to keep in a closet.
I have approx 80 boxes of cigars that I might have to thin down to 20 or so boxes, depending on which option I go with for my future storage.
overall it has been a good solution, but might be better suited to cooler areas that wont need to depend on the cooling.