The original 55 Forge was designed to be a forge that could be made most anywhere in the world from local materials, a 55 gallon drum and pipe. The side blast version is even simpler as there is no assembly needed. As for portability, it is very portable, or materials are already on location.
Hopefully you also show the locals how to use the forge to get the metal hot, and work the metal. When you leave, give the forge to the village elders as a present.
What better gift when you finished with the project, than to leave the village with their own village blacksmith.