Buying cheap tools turned out to be a false economy because they broke so quickly.
Покупка дешёвых инструментов оказалась ложной экономией, потому что они быстро сломались.
Definitions
A 'false economy' refers to an action that seems to save money in the short term but actually leads to greater expenses or losses in the long run. When used as '(someone's) false economy,' it highlights a specific person's decision or practice that appears cost-effective initially but ultimately proves to be more costly.