Sorry, I didn't actually answer your question! The induction forges appear extremely expensive to me, especially for casual use. The one I did look at was well over £2K and even then it was limited on the size workpiece you could get in it.
The forges we used at Oldfield were gas but I'm not sure how efficient they are or how practical it is to run one for home use.
No, if/when I build a forge it will be more traditional, albeit with an electric fan bellows I suspect.
