Since arrows are consumable, my players generally collect extra goblin arrows for re-use (by the halfling with the short bow; they would be too short to use with a longbow, and not suitable for a crossbow). Goblin armor is generally too scrappy to be of any value; their weapons are assumed to be of poor design, quality, or condition. (Yet this causes no ...
I assume that by "gold requirement" you mean a material component with a specific cost.
I have been told that regardless if the spell has a gold requirement,
that your focus cant replace the gold as a component. Is this true?
Yes, that is true. PHB states:
A character can use a component pouch or a spellcasting focus ... in
place of the ...