I finally built a forge for about $100 dollars. WHY DIDN'T I DO THIS SOONER!?
As promised, here's an article that contains a recipe for proper refractory material plus some discussion about design etc...
http://makezine.com/2012/04/05/how-tohomemade-castable-refractories/
Needless to say, there are some dangers inherent in making and using a homemade forge. Please arm yourself with adequate knowledge and proper protective gear before proceeding.
Please enjoy some other videos of mine...
Forging a post apocalyptic survival hatchet from rebar:
https://www.youtube.com/watch?v=m_XANvX1Lno&t=1s
Forging a camp hatchet form 1/2 inch steel plate:
https://www.youtube.com/watch?v=-uMau0gtxJ4
$2 Snake Catch Pole from PVC and Paracord:
https://www.youtube.com/watch?v=1-eFTmMfTKw&t=0