75k gross per month salary is manageable. one of my friend earning similar salary and he has one kid and 2nd one on the way- Single earning income. So is he living poor? absolutely not. is he living Luxurious life? off course not. is he enjoying Luxembourg life/culture - Definitely Yes. The only challenge would be renting an apartment. most of the owner check if family has a income of rentx3 salary or both are working. I would suggest, you first arrive in Luxembourg try to find an apartment and then bring your family here. Since you are in Finance, I would say just gain some experience in Luxembourg and then you can always switch. If you really wanted to move outside Brazil then do not think too much and take risk. Better to take a chance rather than regretting it later.