I hit 45,000 words today. Well over 1/2 way through it.
I've been envisioning this story for a while, since at least late 2000. The first chapter hasn't really changed much in over four years. Just after I wrote the first chapter, I realized what the structure of the novel would be, and have pretty much stuck to that structure.
Of course, some of the details have changed, but the character arcs are basically intact. And during most of the last four years, I really didn't have all that much of the novel actually written. I was up to about 17,000 words as of about six weeks ago, and have written over 28,000 words since then (probably closer to 30,000, but have periodically gone back and pruned). I also keep jumping around what I'm writing. Now that the beginning is solid, I'm mostly writing chapters in the middle and chapters near the end.
Now that I'm having some success at getting the writing done, a contract job is beckoning and I'll have a second interview for a permanent job that sounds pretty interesting. It never rains but it pours...