Which is economically more beneficial and less costly: doing a master's (eco) in the US or in Germany?
Honestly, Germany is well known for its engineering subjects & courses. It would be great if you choose USA for your masters even though it costs you more.
At the end of the day your degree, knowledge, & experience will fetch you a job post completion of your masters and not economical Universities. As far as finance is considered, if you academics are good you will be given scholarships.
Hope this helps 🙂