@Eldriken Actually, Copper only requires 2 coal per ingot made, not 4, so you can actually do what your saying with only 8 coal and 20 copper ore (so less than 1 wagon load, all total)
If your using Charcoal, I think it takes 4, but coal burns hotter.
The point is, while said smelters (which take about 45 mins to fill if resources are near and not played out,) will now take 4 hours to process...during that time, you could go offline, or go grind out some gold and gather other resources at the same time. Like @spoletta said, my 2000 in an hour estimate is on the low side, once you find good gold mobs to farm, but shoot, just hitting the coast for Sea Trolls, you can make the 2K relatively safely, soloing. That's melee or ranged, not sure on cutthroat or archer builds, and that's just using the starter skills plus the 1 you pick up in the tutorial.
As I said, in the Shock Elemental area of Aehren, I make around 4k an hour, and generally can net a recipe every hour or 2 to add to that, plus various levels of topaz, magnetic gravel, and the very common Storm Essence and Primordial Dust that almost every one of the elementals drop. Again, that's solo'ing with my mage, my sister solo's the next island over (with her melee) and nets about the same, with mayhaps a slightly lower recipe drop rate (they don't seem to like to drop for her as much)
So, what you can do is fill your smelter (45 mins-ish) and either log off, or now transport to Aehren with minimal gear near the Shock Elementals via the Harbor (about 4-600 gold) Grind gold for 4 hours, netting about 15-16,000 gold, transport back to Myr, fully loaded for about 3,000 gold (more or less, depending on carry capacity) and you've netted say 12k in gold for that one trip, played for less than 5 hours total, got your 4 ingots made, got your rent, and got about 10k to spend on crafting stuff as well, plus you've got some reagents, a few of which might even sell off at the market decently, and you can probably sell/learn the recipes you've picked up as well for a little extra capital. Even if that's all you play in the whole week, you've covered yourself, and the next couple weeks you can just craft if you want in the same time, until your run out of funds/materials, then repeat the process...you keep your house, you fill your smelter, and your only using about 5 hrs a week to maintain.