The way i figure it is this:
1 lb = 3000 gp
1 arrow = 60 gp
3000/60=50
therefore, 1 lb makes 50 arrows
We have seen mundane weapons by pass the dr of the diplomat, there may be a need for it later. If I buy 25 lbs, or in this case 25 dagger, heck, make it 50. that ould mean i could outfit 15 special purpose troops with 15 adamentine daggers and 50 adamentine arrows each.
or i could arm 48 "spec ops" yroops with a dagger each and 10 adamentine arros and ten normals arrows. this would cost 48 daggers to equip them and 48 gp of normal arrows. This would leave Hedron with two daggers for himself.
I can see either of these being doable.
Now as for crafting, i see in the skills that a complex or superior item has a dc of 20.
Hedron has a modifier of +30 and if he taew a te, it becomes +40. RAW states you can craft (DC*craft skill check0 in sp per day at 8 hours of work. it also mentions you can do 2 hours of work per day, so:
(20*40) = 800 sp per 8 hours or 200 sp of work per adventuring day. an arrow costs 610 silver pieces so it would take 13 days to make 2 arros at this rate.
Slow? Yes. Potentially very effectie weapon makes it ver worth it. IMHO If I can get a full day to work on it that is about 1 and 1/3 arrows per day of rest.