So by comparing we can do this:
President Obama’s welfare spending will reach $888 billion in a single fiscal year--2010
So, using your numbers of 14 Million new cars (60 Billion Dollars) for 1 year, if we cut Welfare for 1 year we could buy 196 Million New Cars by simply cutting Welfare for 1 Fiscal Year. Amazing how math works in both directions. Here is some better numbers:
In 2005, there were 247.42 million registered vehicles in the US,
of which 136.57 million or 55.2% were passenger vehicles,
95.34 million or 38.5% were other 2-axle 4-tire vehicles,
6.40 million or 2.58% was single-unit 2-axle 6-tire or more trucks,
6.23 million or 2.5% were motorcycles,
0.81 million or 0.33% were buses, with various other vehicles making up the rest.
So if we cut Welfare for 1 year, we could BUY or Offer a C4C type program for every Passenger Vehicle in America.
Edit: http://www.cnsnews.com/news/article/54400 Link to back up my numbers I used for Welfare Spending.