Photoshop ChatGPT Illustrations for Kids Book

I am in the process of creating a children's book for my son about the famous Bob Lazar story. This will not be a published book. It’s just for my son. Since the movie S4 The Bob Lazar Story came out, I started telling my son this as a bedtime story, and surprisingly he really liked it. So I decided to surprise him by making an actual book of this story. I used ChatGPT to create all of the images, which I'll include in a pdf file below (I have the original images as well) and some of them need to be photoshopped to get some of the details right. Some of the proportions, scale, objects that I wanted to look a certain way do not look quite right. However the main issue is the face of the main character has also drifted throughout the project and I’m hoping some of this can be adjusted. Overall, the images are pretty close, and I am NOT looking to redo these images from scratch. I'm looking for someone to edit many of these photos to their final result. After the illustrations are touched up, I will add the text to them, but first I'm really looking to get the final illustrations done. I’m also curious how long this type of project would take and its ball park estimated cost.