What are some good editing services for PhD dissertations?

I'm nearing the end of my PhD and I'm currently writing my dissertation. I've been working on my research for what feels like forever, and now I'm at the point where I need a fresh set of eyes to look over my work (more than 230 pages). I'm talking grammar checks, formatting, making sure my arguments make sense—the whole shebang.

Does anyone have recommendations for reliable editing services that specialize in doctoral dissertations? I'm looking for something that won't break the bank but still does a thorough job. Bonus points if they're familiar with APA style, since that's what I'm using. Any advice or experiences shared would be super helpful.