Original Commentary
Kimberly doesn't abide by society's #1 rule... money can fix any problem.

Modern Commentary
Is Kimberly's job within walking distance? I mean, everywhere is within walking distance if you have the time, as Steven Wright said.
"Brisbane tries to talk Kimberly into getting a car" is a recurring thing. Considering that they just got hit for internet fees, it makes sense that Kimberly doesn't want to add another bill to the pile. Really not sure they could afford it.
Re-reading this, a bicycle seems like it would be a good option. Cheaper than a car, but faster than walking. - Terrence