The selling point would be that you might only need one car instead of two - which would make 25k more attractive than 2x20k. The use of a self-drive car isn't

The selling point would be that you might only need one car instead of two - which would make 25k more attractive than 2x20k. The use of a self-drive car isn't that it drives you to the office, it's that it drives itself back home for your partner to use.