Ore needs to be collected by mining. But if you collect a lot of ore, you can also reduce the cost. If you are in a big guild, one of the benefits of the guild is that your decomposition skills get more items, so the cost is lower.

In addition, I suggest two points. One is that the landlord had better get a renovation specialist, so there will be a critical rate of 20%, that is, for every five identical things, there will be one more. This is pure profit. The other is that it is best to convert it into real money, and the income is relatively high.