super wealthy robot owners
Decades ago many people predicted that only the "super wealthy" would be able to own computers, and decades before that the same thing was said about cars.
“Automobiles are a picture of the arrogance of wealth ... nothing spreads socialistic feeling in this country more than the use of the automobile.” -- Woodrow Wilson
So far, there is no reason to believe that future robots are going to be particularly expensive. I already have a Roomba and a 3D-printer, both easily affordable by any middle class family. Prices for manufacturing robots are high, but falling quickly.