But building and installing the wind turbine still requires some emissions.

The wind turbine doesn't remove carbon from the air, so the offset you are talking about is not a real offset, it's only relative to how much CO2 wasn't released in the atmosphere by a more polluting source of power that would have been used instead.

Wooden wind turbines would allow sequestrating carbon (in the cut trees that make their structures) and potentially compensate the carbon necessary to assemble and install the wind turbine, if the trees are replanted.