I've finished the ninth part in my manuscript. Which brings the total number of words before I can actually begin to start cutting things out of it to have a trilogy is less then sixty thousand. I've got some finishing up to do in part eight before I can start the final part, part ten.
When I finish, it'll probably be a trilogy with each book being roughly 125,000 to 150,000 words each. I'm writing to 500,000 as I expect to trim back during editing and revision.