Hey guys,
I am going to buy a car.
I am in dilemma whether to buy a zero mileage car or a used car.

I want to do some cost analysis for buying a new car, my monthly expenses and my savings per month to pay my credits.

Here is my situation:
1. I am a recent graduate with a Master's Degree in Computer from a mediocre university.
2. I recently got a job at a top notch company in my field( but with declining market share and revenue.)
3. I have around ten thousand dollars to pay my credit card bills.
4. I have to pay back my parents for their investment in my education.(Virtually I took a loan from them who in turn took loan from bank and others in Nepal)
5. My current living(lodging+ fooding) expenses is around $1000 per month.
6. Though I am single, I have to support my family members also.
7. My biweekly paycheck is around  $1600 each.

Considering  the current financial situation in US, job security has been a major issue amongst the job holders and job seekers. So although getting a job is a nice start for shaping a career, but one should not take it for granted that the position is permanent. Anything can happen. Jobs are being offshored and departments in whole are being laid off irrespective of your excellent personal performance.

So, hey guys, please share me your information, suggestions and idea on this issue.
What would you guys do if you were in my situation?
Would you guys buy a new car((20,000 on Avg) which will incur a certain downpayments with monthly payments of $300 on average.
OR,
Buy a used car of around <7 thousand dollars one time payment or even with a dealer on finance and be in peace of mind by not worrying how to pay the monthly payments in case you are laid off (due to poor performance of the company or bad economic situation).

Any ideas will be appreciated.