"Accomplish more with less. Constraints breed resourcefulness."
Amazon is famous for frugality. Desks are repurposed doors. Conference rooms have whiteboards, not TVs. "Tell me about a time you solved a problem with limited resources."
Strong answer: your budget for a monitoring system was \0$15$K per year in vendor costs.
Don't confuse frugality with cheapness. It's about maximizing impact per dollar spent. Amazon respects engineers who deliver results without throwing money at problems.