re: Cost of living - Oakland, Ca vs BR

honestly it sounds like a great opportunity. I think many would be lying if they wouldn't take a similar opportunity to move to the West Coast. Plenty of people stretch a little more than you are proposing when moving to a place with more opportunities.

It will be challenging, but will likely build your relationship, which is important with 2 young kids (In my experience, some couples drift apart with kids that age).

Family and friends are great, you will miss them. But I have a feeling you will make the most of your opportunities to see them if you make the move.

good luck with the decision