the forge i made was very simply made bye taking steel straping and making it into a box with a 2inch hole cut in the top and then i lined with fire that i purchased from a custom fireplace store in town the most difficult part in my opinion was the burner.I believe the total cost might have been 15$ in fittings and a hose/regulator setup.this is a link to a similar set up to mine its very informative and cheap remember you can modify the body of the forge to your requirments a little depending on available materials http://www.knifenetwork.com/workshop/tut_burner_warner.shtml