bulk wordpress custom header creations/install

Hi I have 100+ websites created with wordpress. Most of them are just using the standard theme and i need someone to create a header graphic with some text and maybe a picture in that header. I am looking for someone to be my go to guy when it comes to ALL my wordpress site instals+ modifications. This however is a test project where i want 15 wordpress sites modified for 30$. show me some samples of your work and bid 30$. For future projects we can agree on higher rate if work is good but for this project I will only accept 30$ bids. pm me for samples of what I expect a site to look like.