That's a beautiful stove! Canada says you
should keep it 4 feet from your wall (
Woodheat.org).
A couple thoughts on it:
When the door heats up, if it warps a bit will it put your locking pin on a bind and keep you from opening the door?
Usually stoves have rope gaskets on the door to seal them up nicely. Not sure how important it is for your design since it could work differently from commercial stoves.
How does your homeowner's insurance company feel about a homemade stove?
If the only thing above the fire is one layer of stainless, the top of that sucker will be cherry hot. Keep the little ones away.
Edit to add - My assumption is that the stove is sitting on its back in the first picture and it will get legs at some point. The door faces front and the chimney points up at the rear. If that's wrong, my comments above may not be accurate.