Graphic artist needed

We are looking for a graphic artist proficient in Illustrator and Photoshop to help us finish up some cartoons for an educational product. The final number of illustrations will be around 14-16 illustrations. We've already done much of the work already, with the characters and backgrounds. What we need now is someone to continue adding detail and background to the illustrations in the same style as we have already. I've attached a few images of the style we are working with.

This work would start immediately, and would need to be completed in the next few weeks. Since much of the work has been done already, we are hoping to pay $40-50 per illustration (so around $700-$800 in total).

Looking forward to hearing from you!