I think zerg geysers are like 15 minerals but taking drones into account that's like 130. But if he's really pesky, he can cancel rebuilt like forever. Throwing down a forge and doing FE might be nice tho.
The Zerg's extractor costs 25 minerals (+ drone) comes to 75 minerals, however that is a valid point although I wouldn't write out my idea entirely seeing that even if the Zerg opponent is determined on canceling and re-stealing the gas several times - he will always be at an economic deficit.
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