I found these photos of the Kashipur Rajbari (palace) as inspiration photos for the architectural details of the Garfield Manor. While the palace is very different from the Garfield, there are some common features, such as the arched windows and the tower. I might be able to take some of the simpler architectural details and use them on my dollhouse.
The railings on the veranda in the photo below look very similar to the Garfield's porch railings.
The weather-vane reminded me of the one I got for my Garfield. I also have an old Durham water-pump that I can place behind the kitchen, reminiscent of the water tap shown in the photo below.