Hello,
I'm interested in helping you to create custom field for you to put your banner. I will make it easy for you, as easy as add a new post. I can finish the job in 3 hours.
During the production, I can be reached via Skype. I can start right after you finished with your blog.
I'm familiar with WordPress. I've been developing WordPress for 7 years, so I find it easy to do your task.
Feel free to contact me anytime. I'm looking forward to hearing from you soon.
Warm regards,
Anandita Syahwinda