I have not seen them in person, but I've talked to Skutt about them, and have them spec'd (16 CuFt) to replace the 1231's. When we built out the studio I added double swing French doors on the side of the building for this reason.
Have you checked out Skutt's new 14-16CF front loaders? Not used one of them, but the specs, features and price point are impressive.
Supposidly, you can fit them through a standard door opening if you remove the kiln door.
I don't have my worksheets with me, but I think the 16 takes us from 85 to 135 pieces per fire. In about the same footprint. This would be the largest single phase kiln they make I believe.
They haven't published the ambient BTUs generated by them, but the techs told me it was around 32k / HR, so we would have to upgrade our heat abatement system.