Regularly edit product pictures

We are looking for a freelance to weekly edit sets of 50 (could be more/less) product pictures (sport shoes).

We normally follow these steps:

- erase background & add white background
- retouch shadow
- retouch color & lightning
- resize to 800x800 px with weight < 100 Kb in.jpg

I'm uploading a couple of before/after pictures as example.

We would bill per picture, please detail your price.

Thanks :)