>>542078831
>the functionally infinite iron and copper resources makes a primary production facility a very tempting proposition. The downside is that your petrochemicals are not sustainable and you need plastic for advanced circuits. Coal Liquefaction can solve this more or less but you'll simply find yourself expanding to find more coal rather than more iron and copper.
>Still, the lack of biters makes expansive vulcanis factories very appealing.

Just import plastic from Nauvis or Gleba. No reason to worry about cost of rockets because with infinite metals on Vulcanus and Oil on Nauvis you have free rocket parts. That's what I will be doing on my new save. Main base on Vulcanus and making all the resources I can from renewable sources (like getting coal from space carbon). BTW got the best fucking start for this idea, from like second or third seed I tried. Yes, lack of iron is a good thing, motivates me to move to Vulcanus faster. I will never expand beyond these borders.