One of my project forges ( there are probably five others) is Ron Frazier's old sword forge. It is a four foot long, five burner venturi. The rats ate into the kaowool where there were cracks. I am planning on re-lining it with new wool and castolite. I doubt I will hardly ever use it, but it sure is cool. It is on a big frame type stand and the whole thing weighs about 400 pounds.
I am a forge and anvil junkie, because I can't turn one down if the price is right ... or free. I have five forges that are operational ( I use only two of them normally). The two I use most are my NC Whisper Lowboy and the prototype of the Graha that I field tested for Atlas.. The main storage shed in the smithy has four stainless steel forges in the works. I set them aside until I had the new shop done. One is a 30" vertical HT forge for swords.
My eventual and ultimate forge project is a ceramic chip forge. They are sort of a high-tech blend of an old farrier's forge and a modern gas forge. No smoke/smell, no fare up, no going out, ... all with the ability to burry a blade in hot coals and have great heat control. Heats up in 5-10 minutes, and can be turned off and walked away from.