The issue isn’t so much the animation, but the time it will take here.
A: someone has to hand cut out your image (not too terrible, clean job is ~15-30min)
B: A transparent GIF (APNG) is hard to reduce to 70KB.
It would be much easier to leave the background and add in the animation
I’ll do either option.
Transparent: 500FG
Non transparent: 300FG