Check out 'dales freehand firepits' on Facebook. That guy does some great work
Printable View
Here's one that can be made pretty cheap.
My fire pit at camp was a hollow stump. Damn did the burn HOT that night. We had white flame and coals at the bottom of the pit.
http://www.ebay.com.au/itm/181199934...84.m1423.l2649
Might be worth a look also on Ebay now and again instead of a copper insert from the old boilers our parents washed clothes in
occasionally a cast iron one pops up about 25mm thick this would hold heat for ages, Just a bigger version than the link.
I'll try and find one for you, I think they used them in butcher shops to render fats etc.
Or dig in a cast iron Bath
ive got an old hot water cylinder cut in half (cast)
approx size is hight 4 ' wide 2'
have seen this done with the big oxy /acealine bottles also
here's one from a website on FB
saw some great ones at bunnings yesterday
like big round saucers on legs
Attachment 46708 was $139.00
Attachment 46709 $was 199.00