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An RPi 3B running headless with wifi enabled consumes around 1.2 to 1.5 Watts.

You're out by an order of magnitude. 35W over a 5V USB power connection would be an insane 7 amps.

Lol. *.35W I missed the decimal point.

It was off by two orders of magnitude, not one.

https://mycroft.ai might be a viable option - I believe they are planning to use Mozilla's speech recognition work too.