You did say "consumer tech" - so you're probablt aware of the BT-46. But this has been done a few times before... though it's probably more dangerous than ever with up to 1MW (1000kW) output from electric motors. Some of these were actually sold afair.

I'm not sure about those thrusters though, I doubt they'd be legal?

[0] https://en.wikipedia.org/wiki/Brabham_BT46

[1] https://en.wikipedia.org/wiki/Gordon_Murray_Automotive_T.50

[2] https://en.wikipedia.org/wiki/McLaren_F1

[3] https://en.wikipedia.org/wiki/McMurtry_Sp%C3%A9irling