Hopefully you don't mind me jumping in here on your thread as well. I'm in the very beginning stages of building my closet unit as well. Similar to a closet, my opening is currently sheetrocked and finished but there is no door. I've already done a lot of searches on the subject and have already spoken to Marc as well, I'm now currently looking into 2 different build and options.
Here's what I want ...... cooling, a built-in look and maximum storage. Unfortunately, a portable cooling unit would take up way to much space and I've allready looked into wine cabinets, fridgeadors, etc.. Here are my current 2 options.
Option 1: build a separate box out of plywood (mahogany) and then move it into the space. One in place I can do all of the trimwork, add a door, etc.. This would look more like a built in cabinet, or hutch, than a closet humidor when complete. I haven't figured out how to do the cooling for this option yet.
Option 2: build a "cool room" into the space using insulation panels, plywood, insulated door, etc.. Again, cooling such a space has me stumped.
Any ideas?