It is a real bugger to clean the 12 inch one heating as long as it is a well designed enclosure is easy as well, I have a 30x24x12 and a 30x24x18 plus a 24x24x12 and 24x24x16 The 18's are easier to keep the thermal gradient correct and a humidy gradient as well. The cleaning is WAY easier and I do have display enclosures, sometimes there are snakes too.
I actually have may more issues with my bloody rack. The gradient is stable on the middle but the top runs warm and bottom cold I actually don't use the bottom it is too hard to manage.