Is the narrator as rich as Tricki’s mistress?

Answer : No, the narrator is not as rich as Tricki’s mistress, Mrs. Pumphrey. We can say so because the narrator seems fascinated by how lavishly Mrs. Pumphrey spends on the well-being and maintenance of her pet.  He is unusually surprised by the enriching items she sends for Tricki, as he cannot afford them for himself.