Do you really need 3k watt power output? If speed is not a priority.
If you're only dealing with power output to climb hills & against windy conditions, 3k watts seems overkill.
To carry a e-bike on/off trains maybe your main challenge.
From experience, I carry may folding e-bike on-off NYC subway trains, getting to the up/down train platform and over the turnstyles are main challenge to lift the e-bike.
My folding e-bike is about 45-50 lb.; I use it mainly for personal transport without carrying extra weight.
It has 7-speed 750w rear hub motor, I have put about 300 miles on it since MAR 2020. I don't use it often, because lifting it to get on/off trains are real hassle. And the Port Authority of NY/NJ require bikes on trains to be folding bikes.
