Finished forge.
You can now make things in the cottage, cook meat with the forge, etc. All the meat will be left in the forge and there will be small anvils inside, with a large anvil next to the forge. I'll have a large barrel later filled with water for tempering and drinking.
if you want to keep the fire going, just fuel it with woodscraps. 6kg will be all you need. You don't really need it for a long time. (Yes I know 30kg of wood is the longest time you can get on a forge) Activate woodscraps then burn them in the forge. The woodscraps should be in the forge, if not beside it. (I don't know why they don't burn lol)