Need lots of short similar videos created

I am looking for someone to create lots of small videos for me advertising my website. All the videos will be between 28-33 seconds long. We will start out by making one video advertising my site that is pretty general in nature. Once this video is made, the rest of the videos will follow the same basic template with only a few elements changed in each video. The videos can be done in slideshow format. There will be a little creative element and a little fading in and out of pictures. You may have to aquire stock photos to do the first video. All the same pictures can be used for the rest of the videos. For the rest of the videos all you will be doing is changing some text. There will be background music with the video you will have to provide. Basically everything in the video is the same, you just have to change some scrolling text within each video. I would like to have 50 videos made total. And of course as I've already said, the other 49 after the first will be exactly like the first with only a few elements changed. This is more busy work then creative work, but the videos do need to look real nice.