Depending on how close to the city you're hoping to live, Framingham is about 20 miles from Cambridge, and has one the highest Brazilian populations in the US (although Somerville is a close second). It also has much more affordable rent compared to Boston. Only potential downside to consider would be the commute, which at peak hours can be up to an hour or so. For income, I would suggest anywhere between $150k - $250k, but preferably towards the higher end depending on how close you to Cambridge you rent.