Co-Author YA Novel - "My Aunt The Time Traveller"

(American/UK Writers only need apply. Must have fiction samples, preferably YA or MG) Hello all you writers! I began writing a YA fiction novel this past year after a TV script & treatment of mine spiked some interest from publishers who wanted to see the idea fleshed out into a full novel. The story centers on Jake, a high schooler helping his mother care for his three younger siblings. Jake discovers a mysterious device left behind after the passing of his Great Aunt Rita that allows him to travel through time and sets the stage for this exciting book. I've hit a wall about 5 chapters into the book and need either a co-author to split revenues and ownership with me on this book, or if you'd prefer upfront payment as a ghostwriter we could go about it that way. Keep in mind my budget is small for this project so I would like to think there are talented writers out there looking to make a name for themselves in children's fiction that would want to partner on a project like this in hopes of publication next year and possibly work on this if it evolves into a television project as well. I've attached an excerpt and early artwork for the TV show I was in early talks to produce. Thanks! Joe