I feel i can do this in a shorter time and I have been doing web animations all my life , So you'd be in safe hands.
I have done animations from 3D rendering ,SVG and canvas animations , pure CSS animations.
I guarantee that the work would be done on time, with no compromise in quality.
I charge people based on the work at hand , your task seems pretty simple , which explains why I bid 50$. Hope to work with you soon.