How to get better fuel?

Even without Fortune buff I think the Coal Veins found when searching for various needed Ores would last a while.
I feel that much more trouble lies in the fact that high tier Boilers and Turbines need either Tungsten, which is not easy to find and complex to process (with a yield of only 1 Tungsten per Tungstic Acid), or huge amounts of Stainless Steel, which needs Chromium, which is, again, expensive both in terms of Ore and in terms of processing.

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