I am definitely aware of the budgeting tools available to me at Google, Yahoo, MSN, etc., but it's up to me to determine the budget amount.
I'm curious as to how others determine what budget amount to propose to a prospective client when the client operates in a specific geographic region. Of course I can build a sample set of terms and run them through adwords traffic estimator tool, but there has to be a more precise method. I've been taking population * ad exposure * internet usage... This is much more accurate than the estimator tool.
Has anyone found a better method or formula for determining what budget to recommend for a client in a specific city or region?