Final answer:
The Buchanans are depicted as wealthy with an elegant and well-maintained home, suggesting a life of comfort and harmony with nature.
Step-by-step explanation:
Based on the excerpt provided, the inference that can be made about the Buchanans is that they are affluent and lead a life of elegance and comfort. The detailed descriptions of the setting, such as gleaming white windows, frosted wedding-cake ceiling, and the wine-colored rug, suggest that the Buchanans' house is well-maintained and stylishly furnished. The presence of fresh grass, a breeze, and the overall serenity that comes through the description imply that their home is not only luxurious but also tranquil and harmonious with nature.