1 car is a requirement for most families (job, school, etc). 2nd is a luxury.
I spent a long time living in the burbs with a wife and 2 kids and 1 car.
I did NOT enjoy it, but we got by, and cars do not have economy of scale. 2nd car costs just as much if not more. But a single car makes you work out your life a bit more in advance, which also means gas savings.
Edit: This was supposed to be a reply to:
"Even if that $2k is in a 2nd car they need. Hmm... "