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> 1 team, 10 houses = 10 weeks, 2 teams 10 houses, = 5 weeks. Ballpark.

Concrete needs 4 weeks to cure.

https://www.hunker.com/12002648/how-to-paint-an-exterior-hou... suggests building doesn't need foundations to be 100% cured, and you can start after a week or two

Here's exactly the same article but translated for a UK perspective, it's hilarious

> Do not pour concrete in temperatures below -6.67 degrees C.

> Temperatures of 21.1 degrees C compared to 10 degrees C, for example, reduce the 50 per cent strength curing time from 6 to 4 days

The issue is not cement or how long it takes to be cured, rather the crude and easy determinism of it all.

Home builders don't generally face existential struggle with the timing of the issue.

You don't go 5x over budget and have it take 5x longer because of this.

You can reliably schedule around cement.