Star Car Wash

I run a marketing consultancy and have Star Car Wash as a client, and their NZ brand Espresso Car Wash. We have retargeting activity live for Star on GDN but I need help with managing / optimising this ongoing. I also need help to set up and ongoing monthly manage / optimise for Espresso. Media spends for both are low - Star $1500 and Espresso $500 so I don't want a high fee - I'm thinking a few hours per month should be sufficient. Would like to discuss further. thanks