So, for how much metal to buy, we have 30 "slots" of gear to fill. the plan says to lean it towards armour, so I'm mainly pull the numbers for that.
Each Balance point of metal is 12oz, so we need:
Short Mail (200oz) - 16.666 Balance per - 500 Balance for all 30 slots
Full Mail (250oz) - 18.833 Balance per - 625 Balance for all 30 slots
Helm (30oz) - 2.5 Balance per - 75 Balance for all 30 slots
Mail-Necked Helm (45oz) - 3.75 Balance per - 112.5 Balance for all 30 slots
Swords (18oz) - 1.5 Balance per - 45 Balance for all 30 slots
Overall I don't see an issue with buying the metal for 30 full mails, hes got 2035 Balance to spend
If we also buy the Iron for the separate crafting job that is Dorri's Hird, he probably wants Sword/Full Mail/Full Helm for each guy so were looking at 313oz per guy (not including if any of them are giant-blooded) so thats 26.0833 Balance for a fully equipped guy.
@Imperial Fister does Dorri want us to grab the metal for his Hird now as well, and if so, how many are there, are any giantblooded, and do any of them want different from Sword/Full Mail/Full Helm?