Farm/Mine Upgrade Return On Investment

Cool man, I’m pretty sure that SH20 is around an 8 day wait. Seemed longer :joy::joy:

Good luck my friend and may RNGesus always smile upon you!!
Let us know when you get there!!

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After reading posts, links, and various other information, I believe that the best place to stop upgrading (temporarily) for the push to SH 20 is LVL 11 on the mines.

After reaching SH20, mines can continue to be upgraded. This captures the last largest increase to production per hour, and maximizes the time of production without any setbacks on recouping lost iron due to production halting during upgrading.

Thank you all for the information and advice.

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@Oriontron, its exactly where my mines sat until I upgraded to SH21. It left me with plenty of iron, but not too much