I'm researching my first pizza oven build and am attempting to make it lightweight and under $300 for the build. In general, it seems like all that's needed is a well insulated container with good airflow that can withstand temperatures up to 700-900F.
Going with a base of 2.5" firebricks, I was looking to create an air-hangar style design with a front chimney. The hangar would be insulated with 2" ceramic fiber blanket. The interior and exterior of the hangar would be some kind of sheet metal, possibly steel or aluminum. The back would be the same, and the front would have a door most likely with hinges on the bottom so it swings down as opposed to the side. The door will have a controllable vent to control airflow and monitor temperature.
Does this design work, or is an igloo dome required for specific airflow and temperature trapping? So far, it looks like this can be build for under 300 easy and just needs a stand. The heaviest component is the firebrick.