Lot of people could not afford to buy even the clean-tron 5000 so instead of buying, they would rent it for monthly fee. When the time for upgrade comes, the 5000 will be replaced with 6000. It is possible to do the same with phones and computers but people don't do this because phones and computers are little more affordable to own. The robot price would not be comparable to computer, it would be comparable to car, personal driver or servant. So imagine company that rents you car for permanent personal use with you permanent personal driver and if you upgrade to super deluxe subscription you can also give tasks to any nearby robots that are not rented for permanent use by someone else kind of like you can use Uber. This model is very likely because robots combine big price with big need for upgrades. Phones and computers are comparably lower price with similar needs for upgrades while cars and renting real person for service is comparably high as price for robot but with smaller need for upgrades and replacement. It is possible that with renaissance of robots, paying real person to do similar work would become cheaper. One would try to outcompete the other.