I think the babboe is the best choice, for your situation. Nihola is probably heavier, but perhaps more repairable.
I had a friend in Denmark who was using one with 3 kids. seems undestructible.
As for electrification if you're mainly on flat roads it's not that useful. I use a Riese&muller "Load" and there's almost no need for pedal assist on flat.
And anyway prefer something your LBS knows...