Related to your line of inquiry, the Effective Altruism movement tries to answer the generalized version of some of your questions. Unfortunately I don't know

Related to your line of inquiry, the Effective Altruism movement tries to answer the generalized version of some of your questions. Unfortunately I don't know enough about this specific instance to provide a helpful answer. The gov.ua links are probably the most effective since the Ukranian Government is highly motivated to make effective use of all the money it receives. Maybe this is one of those cases where perfect is the enemy of the good?