People in the US buy cars.
Can a household robot provide as much utility as a car? If "yes", the market gets pretty big.
Not really. The car is a non-negotiable, like food, unless you live in Boston/NYC/SF or something. The robot is not.
You don't even "need" to clean your house (yes, yes, I know). You do need to drive to work.
How does it compare to hiring a human?
I pay $200 every 2 weeks to have a 3000 sq ft house cleaned.
That's about $5200 a year to fully clean a house. And it's a human, so they can also tidy up, clean out the refrigerator, do my laundry, water my plants, etc.