I have a hard time understanding "size"

Hey all

I am playing around with 2d animations for a game idea I have. I'm trying to emulate the old might and magic 6-8 rpg pseudo 3d and have made a workflow that automatically Rejsers 16 directions with every animation (8 from normal perspective and 8from 45° high). I know it is a lot but I always wanted the two different perspectives when I played as a kid. My issue is that with all animations done I have 500 mb pr model. Is that a lot?

This is my set up ATM:

• Single sprites but I'm planning to try spritesheets later.
• Around 18 frames in each animation times 16.
• Each frame is 1000x1000 pixel
• 8-bit color.

Later on when I'm done I want to try tinypng and see how much it can save.

I am planning around 30 characters.

Let me know if I'm way off or if I have missed something important.