Illustrations in a childlike style for primary aged children

I'm currently investigating a new project which may include the need of 30 illustrations that would appeal to children.
The attached is an example of the style that I think suitable for my project.
The space for illustration is 17" square. The images would be based on occupations: Doctor, Nurse, Vet.....etc and would need to feature a friendly face in relevant attire with a tool of the trade so children can identify. It may be we only show the top of the body but could discuss in more detail.
I have suggestions regarding designs and have a list of the 30 occupations that need to be covered.

The work would need to be completed in illustrator and each image dropped into a template which can be provided.
We would be limited to 12 colours + white.

I am looking for a quote to provide and would like to see some examples of similar work.