So I’m going to recommend something completely different.
If you are talking about long term maintenance often while you are away, and for large volume, I would suggest large food safe, airtight storage containers with Boveda packs inside. Store those in a manual defrost freezer with an electronic temperature controller.
This setup allows you to separate humidity control from temp control. Many here can tell you from experience that when you start needing to come 5-10*, you end up with wild rh swings and condensation issues. Separating the two things will make things a little more foolproof. Utilizing the freezer with an FTC will provide some significant insulation, and you could also use aquarium heaters to provide heat if desired.
I don’t utilize this myself because my stash is smaller and I keep my house cool enough, but I have a friend who keeps a substantial collection properly stored this way and he loves it.
Well, not completely differentPick up a full size fridge or freezer off Craig's list and hook up an external thermostat.
Google "fridge mods" for home brewing. Lots of ways to do it, ranging from simple to complex. For your purposes you could keep it simple.
Then put your cigars in tupperdors inside the fridge.
Great minds...