you won't like my answer... but being high level (mistlands gear) you mine faster (better pickaxe in ML update) and ML also drops copper scrap in bulk if you want to go that route.

As for a node or 2 being all you need ... not for builders. Several uses in home burn up large amounts.

if you are actually IN the copper era, get what you need as best you can and come back later when its easier to get.