Complex billboarding tips?

Hi,
In order to achieve a certain aesthetic, my game will have 2D characters in a 3D environment. I plan on using doom style billboarding, but with many frames (around 200 for the player character), and as high of a resolution as I can manage to achieve for each frame, ideally 1024. I’m willing to downscale if this is some sort of impossibility, but I’m dead set on using this style one way or another.

Any advice for how best to do this in unreal? I know I should make the frame sizes multiples of 2. Would it be best to use multiple 8192 by 8192 sprite sheets (fitting 64 frames each)? Is there some way to streamline individual frames into a sprite system? Thanks.