If main objective is fuel economy and low costs get an Alto.
Both Passo and Vitz will be old models in this budget around 2013-2012 that are in actually decent condition. It will be hard to find a clean one.
You will also have to visit scrapyards daily to find expensive parts if god forbid anything happens like side mirrors, lights, bumpers etc.
Of course these JDMs are bigger and better cars there’s no comparison but only buy them if you can afford to maintain them .