Yep. I am at this point, too.
I really want to work as a tenure-track research archivist in a university hybrid library-archives-museum setting. Many of these positions have a dual appointment in an English department. A PhD isn't absolutely necessary otherwise, and I already have a subject MA, so I should be good. This was my last shot at trying for a PhD. Not to imply that I have applied before; I hadn't. But I had been thinking about it for 15 years. And more and more of these types of jobs want PhDs, plus I would genuinely enjoy continuing my research at a deeper level in an English department. I guess I'll have to stick to continuing ed in the form of MOOCs, staff course benefits, and Rare Book School. Not too shabby.