Hello,
I have a long history of managing and optimizing campaigns for clients and deep understanding of the auction process in AdWords campaigns. I have managed hundred of campaigns from very small ones to huge projects and always delivered good results. Please, take in considerations that for very best results, some landing website optimization might be needed as well as these are connected and can affect the final CPC.
If your account is small (up to 5 campaigns / 1000 keywords), then I can deliver in 5 days. if your account is larger, then proportionally longer time may be required.
Kind regards,
Jakub