I have a web design client that is now interested in PPC. Their monthly budget is $2k USD. AdWords only. I remember reading 15% +/- of the budget was a healthy fee to charge but I'm not sure $200 a month is worth my time, for the amount of tweaking and reporting that would be required. They are only targeting 6 keywords. Any advice on whats standard concerning charging clients for PPC. Is there a setup fee, Do you charge monthly or by the year, do you their credit card for adword billing or your own, etc?