WordPress designer with some flash knowledge

I own a network of new websites which regularly need to be updated. Several websites are Wordpress themes which often require updates to the header and navigation links etc.. Another site is flash based and the last is Joomla. I am looking for someone who is affordable as these sites are very new and not highly profitable, but this will result in steady work. Please let me know your experience in Wordpress, flash and Joomla. This could result in long term work relations, and I have work to assign starting today. With regards to price, please give me an idea of what you would charge to update a header of a website with new images, and an average hourly rate.