Need video creator desktop software.

Hello, I have got 5 common images, 1 audio file and thousands of unique images. What I want to do is create thousands of videos from them in slideshow, either avi or mp4 format, which ever is smaller in size and better. 1st slide will be common image, 2nd slide will be the unique image, and then from 3rd to 6th image will use the common image, and the common audio file. The video file name will be same as the unique image file name. Each slide will play for 7 seconds. It should generate video after video automatically and should run at good speed, I have about 50,000 unique images, I want the 50,000 videos to be created within 2-3 days. I have good hardware (core i7 gaming pc). Software should be easy to use, I don't want to run with python software, python is ok but should have a desktop icon to run right away, I want simple GUI to use in desktop windows 10. Also, I want the videos to be unique according to youtube, it should encode each video as unique everytime. Budget - $30 Need it done in 1-2 days. Thanks.