I'm going to leave the price where it is long enough to get some verified customer reviews. I'm the person who created Free Amazon Reviews for Your Featured Book, and the book is listed both there and on an internet site set up for the same purpose (but I didn't create the internet site, and it is not free). Once I have a respectable number of reviews, however, I'm going to follow your advice to compare the price of my book with the price of comparable books that are doing well annd price up accordingly .
I just looked on KDP and found only three categories allowed for both the paperback and the eBook. I do have three. I, too, had heard there were supposed to be 10. But that appears to be a rumor rather than fact. Well, unless you know a way to increase the three to 10 that is not apparent by looking at the page.
As to Publisher Rocket, it's $97. Oh dear.