You're forgetting those eye watering return charts they will be promising. The government will probably give them kickbacks or something similar to get it established at first. They have definitely done this in the past to help businesses (Texas Instruments, Foxxcon, Amazon, Volkswagen and many others they spend about $200 billion a year doing that)
Also when someone dies they don't get buried Egypt style with their robot, that unit would be the property of the company/insurance/facility and go to the next person. Although I will admit mortality rates among elderly is something I didn't consider but disabled and injured or otherwise handicapped people will be the customer base as well.
And I don't know if I said it in this comment or the other one but getting them into facilities/hospitals will absolutely be the end goal of all this but they have to go slow and test it all out first which is why I think getting them into homes will be the first goal.
Also to add more to this, the 15¢ savings was just me being cynical the actual savings will be a lot more significant but the subscription model they will undoubtedly attach to something like this will be the real money maker I'm guessing they'll charge it annually and I bet it'll be quit expensive.
I use GNOME on my distros so it's pretty handy for operating the system with just a keyboard.