Thanks, all. It will make Himself happy to win on the depth issue.
As to snow depth... where we are in the Cascade foothills we usually we get a dusting maybe once or twice a year. This past winter was exceptional; we had nearly a foot for weeks on end! What we do get is rain, pretty much constantly in the winter. I've requested a porch at the front door, and a generous roof overhang for egg collection.
I have spec'd cleanout hatches all along, so I can just get in there and push the litter out through the hatch. The coop is up on blocks, so I'll be working with gravity.
The door -- oh, wait 'til you see the door. We got a used front door on CL, complete with sidelights, and all 3 parts are still in their frame. We will just pop it in; it will take most of one wall. I'd rather it swing out, but Himself looked at it and said it wouldn't do. I forget why. Probably something about which side protects against the weather. 
What I'd like is a little antechamber -- an airlock or more accurately a chickenlock /storage area. That would be level floor as I walk in using the lovely front door. Then a sliding door & step(s) down into the chickens' area. 
I had him sold on a storage area, but now he doesn't want to give up any chicken space. We shall discuss this further today, I suppose. We'll be buying feed 10 bags at a time to get the price break (and storing them in an old paint locker, which is perfect). I truly want the supplies near the chickens.