My kiln with its 1.25 cubic meter combustion chamber is in a self-made wooden shed. Originally it was built as ankogana in Japan and then further developed in the USA as the Phoenix type at the end of the 1970s; the construction plan was published there in a specialist magazine, and a hand-drawn copy made it to the GDR in the 1980s.
It takes 2 days to stack the kiln. I have to keep climbing inside it. It matters a lot how big the spaces are between the pots. The flame has to pass through them on its way to the chimney which is 5 meters high and creates the draught.
Every firing changes the kiln a bit, just as I probably change a bit every time and learn something new. Then the desire to start all over again always grows immediately.