That artist representation (8 rotor) looks somewhat like the Jetson's "car". But Alexa doesn't look like Rosie.
I've considered a Rosie robot replica. Of course not to push a vacuum around or to make beds.
But maybe to be used as an end stand, or maybe also an emergency light. Or... maybe (when I replace my Home Theater Projector) as a mobile Home Theater or sorts. I have a man-cave and plenty of cold weather spare time.
I think Coroplast (corrugated plastic sheets) would make a cheap, easy, very lightweight way to make Rosie.