What does the narrator mean when he writes that there was a wild inconsistency in the house

A.  some parts where in terrible condition while others where great.

Explanation:

The Fall of the House of Usher is a short story by Edgar Allan Poe first published in 1839 and is where the excerpt above comes from.

The excerpt talks about a "wild inconsistency", well, the word inconsistency means something that is not stable and does not maintain a coherence. Thus, we can conclude that the term "wild inconsistency" is referring to the lack of consistency and stability in what was happening in the house, because the house had some parts where in terrible conditions, while other parts were in excellent condition.

by explaining that it took the same total time to travel by plane as it did by train

he uses the metaphor autumn.