Illustrations for Kid's Book

Hi there,
I need to get an illustrator for a kid’s book. It is autobiographical in nature so it will need to be able to show people in an identifiable manner, with the topics being around cars, motorsport and motorbikes. All images will need to carry identifiable objects, ie, a Harley-Davidson must look like a Harley-Davidson.
We will be starting on the words soon, which means we will be ready in about 1 month to start on the images but I need to lock away a budget.
In all, we’ll need maybe 20 with a cover.
Andrew