I'm not sure.
I think house cleaning/chores require at least a "part-time" job's work of work for the average household (especially with children). We may be atypical, but my partner and I don't want to hire out a cleaning service and deal with the whole human component. But, I think we'd gladly pay 15k+ if it allowed us to take on the additional gainful workload. Even at a 20k price tag, I suspect we would likely have made up the difference in under a year.
If you can even afford 20K you're in the top 10% of the US population. It's not a very big market, and even selling to that market is hard. Probably only 10% of that 10% will actually buy, and all of a sudden you're selling to 1%.
Selling to businesses is much easier, 99% of businesses can afford 200K if it replaces 3 x 70K humans.
Your napkin math only shows that the market is identical. There's about 35m businesses operating in the US. So by selling to 10% of those you sell the exact same number of robots...
People in the US buy cars.
Can a household robot provide as much utility as a car? If "yes", the market gets pretty big.
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.
You'd have to pay me this much to let a human inside my house to do that.
Where I live, you typically share house cleaners with your neighbors or family members.
My parents, aunt/uncle, grandparents, and one of my neighbors uses the same house cleaner.
If she stole from me, I’d immediately tell my family and she would lose basically all of her clients.
That makes it easier for me to trust her.
(It works similarly in NYC apartment buildings - a single cleaner often services many people in the same building, so they have a reputation to uphold)
I would never use random online cleaning services.
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.
Actually the high income households are becoming a greater and greater share of spending, referred to as the "K shaped" economy. For example, the top quintile of households accounts for about 40% of all consumer spending.
Most people finance vehicles that cost much more than 20K.
I'd gladly pay or finance a robot that could have dishes clean, laundry folded, and carpets vacuumed by the time our family got home.
I don't think a cleaning robot and a vehicle are in the same category, as vehicles are more a necessity (at the very least to get to and from your jobs, to buy groceries, etc) and a cleaning robot is squarely a luxury.
A car saves you time walking/biking, a robot saves chore time. Depending on depreciation, it's feasible that you could go do minimum-wage level work on Doordash using the chore time you save from the robot and still come out ahead. E.g. 5 hours/week at $20/hour = $5200/yr
Vehicles, when first invented, were 100% a luxury, not a necessity.
They only became a “necessity” once they went mainstream and the world started evolving with vehicles becoming a part of everyday life.
I can certainly see the same thing happening with residential robotics.
Only way I can see that happening is if you somehow get fired for not folding your laundry, in the same way people are fired when their car breaks and they can't make it to work.
At some point, household robots — once they become mainstream — can do things around the home that you depend on, and if/when they break down, prevent you from being able to work/get to work.
Or, if the stress of doing everything they do is too much, and interferes with your ability to work and do other things you once had the time to do.