I did a little bit of searching yesterday for information on typical word counts for a novel. I know I once saw a chart that showed the expected word count according to genre, but I don't recall where that was. I think it was an edition of the Writers Market, back before I realized that the Internet pretty much eliminates the need for that book, but it's not the last edition I bought (and the only one still on my shelf), 2007.
Anyway, I found this most helpful post in determining the appropriate word count for juvenile and YA books, but since I decided some time ago that Ruby Ransome wasn't YA after all, that's not very helpful. I did some other searching, and finally Googled the titles of a few books I think are most like mine in subject matter and audience.
Dead Until Dark, the first of the Sookie Stackhouse novels, is at right about 90,000 words. I found another site that stated adult fiction should be above 80,000. I also found some information about word count per published page (250-300) and according to that, if I want my book to be 300 pages or so (which I do, at least that), what all of this means is that I really do need to make 80k.
So, after a short period of doubting, I'm back to my original goal for total word count. Hopefully, once I fill in the gaps in my outline, this won't seem quite so impossible!