I guess there are more of us out there than I might realize. Here's an article by Christie Bleck, yet another person whose love of architecture grew out of a love for DS:
Bleck: Church's architecture intriguesPhotos of the Studebacker Mansion/Tippecanoe Place can be found
here and
here.
Several photos of Copshaholm can be found
here (and I definitely agree that it's the spookier of the two). If only it wasn't in the Queen Anne Style (1880-1910), it could make for a great Collinwood (particularly the East, South and West views - though they'd definitely have to get rid of the air conditioners
). Although, the daytime series' Collinwood was certainly ahead of its time.
And Mason First Presbyterian Church can be found
here. (Though I have to say I prefer the other two.)