Ok, I know the most of us will NOT have access to clay from a termite mound... It is not the only source of clay.
https://primitivetechnology.wordpress.com/2017/03/24/termite-clay-kiln-and-pottery/The video is excellent and at 11:27 minutes, and 54.1 MB, it is not a big download (you can stream it but I think saving a copy is a good idea...)
The article also has some good text description of the process, but you do need to SEE it done to understand the various pieces.
DO NOTE: a source of dry wood for firing will a necessity, so plan on needing a ready supply which is easily regrown. Burn times for this kiln are fairly short, 1 to 4 hours. That is still a lot of wood.
Finally, the ability to make water tight contains will be a major benefit in a PAW... Business opportunity - definitely.