for the OP:
If you're on a legal shard (which have all expansions through Mondain's legacy available to all users), the fastest way by far is to have a tamer tame you a Fire Beetle in Tokuno's Yomotsu Mines dungeon, then transfer it to you. Once it has bonded to you, you can smelt off it while it's alive.
I Typically go out with tools totaling about 1000-1200 total uses, smelt whenever I reach weight (or between stops), and can carry all my ingots back home after the tools run out, without any stops to unload at home. If you bring along a pack animal or use a bag of sending, you can probably mine all day without ever having to unload at home until you need to log out or get more tools (and if you are a tinker, you can make normal shovels from your iron as you go).
On illegal freeshards with rulesets predating the Samurai Empire expansion, you're stuck doing drag & drop, or hauling ore back 133 at a time in pack animals.