A single stirling generates 20 energy, so you need 3-4 wind to get the same, so you compare 6 polymer and 3 electronics (and 1 polymer per maintenance) to 12-16 concrete and 3-4 machine parts (and 1,5-2 machine parts per maintenance), polymer is easy after you have dome, and you need that machine parts for everything else.
closed it generates only 10 energy but cost 0 maintance

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but lets break this even more

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1 Wind turbine will consume 1 machine part every 10 sols (0,5 every 150h more or less) = 1,8M /day of upkeep.
2 Solar panels + 1 batery cost = 1M from the metal + 2,8M from the battery to a total of 3,8M/day.
While a sterling cost 0 to produce 10 energy. or 2,8M/day to produce 20 energy.
Way too expensive. Machine parts is what i produce first anyway (second passenger rocket). so obviously going for wind after a brief solar period. Machine parts are basicly dirt cheap. Stirlings are imho a mid-endgame project. Early on i focus on immediate rewards no matter the longterm costs.
on my first games i did used what you are doing. Factorys first, but its way more expensive. its cheaper to just buy the machine parts until you have colonists to keep the factory working at least 2 full shifts.
let me break down to you why its best to not bring a prefab of machine parts.
Each building require maintance every 5 sols. (More or less).
Machine factory cost to keep.
30 energy (That demands +6 wind turbines on top of what you need to keep the dome).
You can also go for 9 solar panels +1 batery.
2 eletronics every 5 sols. (That alone is almost a cost of 10M/day).
5 workers (first 10 days you have only 12 max. And rare minerals is priority).
Also the factory itself cost 400M.
5 machine parts cost only 90M. By the price of the factory alone (400M) i can buy 20 machine parts. Something your half dead factory will need around 10 days to achieve.
Instead of that i keep those 5 workers on the rare mineral factory producing me 2 to 6 rare minerals/day. That equals to 48-144M/day!
Enough to buy the machine parts and anything else i need or want.
Specially if you manage to research the 1500M research with a anomaly. You will arrive with more than 2000 Millions to spent with a rocket that can´t even bring colonists yet as you are likely still waiting the first 10 sols after the arrival to end.