Adwords optimum campaign setup

I have several customers who require Adwords setup Please bid on the first of these, an small one, with a budget of $120 per month. What I need is someone to get the project up and running at its optimum level (what do we aim for, impressions? clicks? CTA?, CPA?). I need to be able to justify to the customer the details of the campaign therefore you need fully explain how it was set up and why we did it this way. Please make a one-off bid (not recurring) for the setup. Thank you Ferrino