Create 50 or more Infographic videos or 3D/2D Animation

I am doing a project with a non-profit organization about the environment and pollution, and we're planning on doing 50 or more infographic videos (30 seconds - 1 minute each) or if 3D/2D animation is easier, we're interested in that as well. we will give you the idea for each video needed, and we can talk further details then. The idea and the goal of the video will be clear, and simplicity is always the best option. we are trying to have a common style between all videos, so this would save you a lot of time if you are doing most of the videos we need, since you can use some designs from the previous videos. I set a random budget for this project, as i don't know how much budget we will set for the videos. I will take freelancer's idea on price and present it to my supervisor. how much will you charge for each 45-second infographic? what about a short 3D or 2D? can you show me something you did? just so I could have an idea of your work. we're really not looking into sophisticated 3D animation.. just a way to show the public and educate them about the environment. first please let me know what you think about this. Could you do all the videos? if not, then can you do at least half of them? We can start this week and the full 50 videos will be needed on October 1st, and we will be with you for every video to make sure we're both on track. We will also pay you 80% of each video's cost after the submission of each video, and the full amount will be delivered to you at the end of completion. Also i need to know if your English is good enough, as this will be our main language of communication. Arabic language is a plus I need to know soon and if all goes will, I have many more projects in the future thank you