I am a professional writer - a native English-speaker born and raised in England. I have had numerous magazine articles published, was a magazine editor for a few years, and have had two books published (one of them a grammar reference book).
Your project sounds interesting, and I would enjoy working on it. However I don't think I could do it within your budget. It would require some research, and this kind of project cannot simply be "dashed off" in a few days if you want a professional job done.
You don't say what is to be done about illustrations. I assume that you will hire an illustrator as well?
If you are happy with an unprofessional, cobbled-together project, then I wish you the best of luck. However, if what you want is a professional product, written in a very readable style and without grammatical or spelling errors, then please contact me!
Alternatively, if you wish to hire me to edit the booklet to fix all the typos and grammatical errors, I am available for that service as well.
Thank you.