fixed hazards will be the real challenge
A wheeled robot can only navigate across a relatively flat surface. SF has some notoriously steep hills with sidewalks going straight up, some of the sidewalks even have steps. Then there's the curb, newspaper racks and detritus.
Aside from the Jawas, you'll have to make a human delivery point, and that human won't want to receive if the Jawas are watching.
Biting the hand that feeds IT
