Proof edit of a 112,000 word, contemporary romance novel. (No A.I please!)

I have a 112,000 word novel in English (sport, F1, contemporary romance) that needs proof editing. I don't need line or copy editing at this point, just a final proof editing before publishing.I'm looking for a quote for the full book (or if you work hourly, I'd like to know a very close approximate to what the cost will be!)

The book itself does switch between American English spelling and British English spelling. (on purpose)
Please no AI usage!

* Please note this novel has some adult content in the way of sexual scenes, however the book is a modern contemporary romance, in the style of "The Idea of You"

More details:

Completion by mid August at the latest, if possible, earlier is better, but I also understand it might take a while.

This is a personal project that I am looking to self publish this year,