Image editing

Design details: I am starting a new online business and have a lot of images that I need editing to make them ready for the website. The editing specs are simple:

1) remove the white background
2) trim image down to the edge of the product
3) change image size to a height of 600 pixels (the width is automatically adjusted)
4) sharpen image
5) place on a background colour f5f5f5
6) save as jpeg

I can do this myself and have already done 300 images myself but with my business launching in 2 weeks I have other areas I need to focus.

I will be looking to pay £10 for every 200 images (I have about 1000 with more to follow)

I will need the to get about 300 done every day if possible
Ideas for the visual style: web ready
Extra notes: