I think you could find a turbo that doesn't need 1000 hp to turn.
Not 1000 hp, but not more than 12-13 amps per vac either.
That's the biggest factor limiting electric vac motors for portable units.
Only so much you can do with that many amps, and the latest high performance vacs are as good as it is going to get until improvements in electric vac technology can deliver improved designs and efficiency.
Porty vacs also have sealed bearings for use in wet applications.
I can only imagine what a little foam or moisture would do to an expensive supercharger.