Corrected entry: In the beginning, we see the rocket that came to bring the main character supplies carried 3 men and the crate containing the robot woman, meaning it can hold at least 4 people and perhaps more. However, at the end of the episode, the main character is told that the rocket only has enough room for him and the pilot, so he must leave his robot wife behind. Why wouldn't they return in the same rocket from before, and if this is a smaller rocket, why would they have chosen to bring this one when the main character possibly could have had a lot of stuff he wanted to bring home. We see he could have car parts shipped to him and was able to build a car, so these rockets must be able to carry a significant amount of weight. It's almost as if the pilot wanted him to have an ultimatum.
Corrected entry: If the rocket ship has so little room on board for everyone, including the robot and all the supplies, then why not just come back to get Corey and the robot on the next scheduled pickup? Since the ship wouldn't be full of other people and supplies they both could easily have gone back together the next time.