Hi,
I am happy to fulfill your proposal. I have 5 years + experience in using After Effects (CS6 onwards to CC).
Assuming I've understood your proposal correctly you already have the assets, including the butterfly character with a transparent background (alpha)? And only the movement needs to be altered in AE?
If this is true, it should only be a few hours work. I've bid below your budget as this is my first bid and could do with building my rating/reputation.
If you trust me with your project and we communicate effectively (and all the assets are available, and just the direction needs altering) I could deliver it as early as this evening. I have allowed for 2 days in the worst case scenario but I imagine it would take much less time than this.
Kind regards,
Rhydian