Here's something that hit me by surprise while I was doing some light google dorking on this.
The main mention of the Redd Manor is the development in the Philipines. Given the nature of the project, a "condotel" (condominium/hotel) it's pretty easy to dismiss this as being relevant.
I did some digging, and found one other example. However, given the nature of the controversy surrounding said person, as well as the apparent maturity they show in posts, I'll be willing to believe candidate one is... at minimum, 23 by now. This would also mean that the person in question underwent some sharp changes in ideology and behavior, leading me to believe that option one is out of the question.
The second option is from DeviantArt, but is also far-fetched. After some searching, I found no unusual activity that can connect anything to here. That leaves The Redd Manor as almost definitely being a creation of the author.
Seeing how far you currently are in the story, I won't post too many spoilers here. However, I don't think it's likely the Redd Manor is the location in question.
My reason? A pseudonym used later on in the story by an unrelated character is "Mr. Redd." This is content that is new to 0.11, which I missed as I was out of the loop on this novel for a while.
That was the reason I started that googling again, and how I found the additional results for "Redd Manor".