Finance,PPC Marketing,PPC Management,Softwares

If I want to hire a firm to manage my PPC ads on Google and Yahoo, how much will they charge to manage an advertising budget of say 1000 dollars a month?

I work in SEM advertising and manage PPC accounts for a large company. I was contacted out of the blue by a company asking me to manage their accounts on a freelance base. What do I charge?

Do I charge by hour? By % of budget? Also what is the best way to set up a relationship with the customer, having them pay through paypal or something else? Any help is appreciated.