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iThink - 9:30 am on Sep 22, 2008 (gmt 0)
Start with a budget of $3000, that is $100/day for 1 month. Have a good look at Yahoo and MSN too. Consider yourself very lucky if you are able to break-even in the first month and If you are able to break-even in 1 month then you are on the right track.
So $2000 adwords expense brings $5000 gross to make $3000 net profit. Difficult?