The area is generally very diverse up and down the income ladder. Your kids will not stand out for being immigrants, and neither will you. Cambridge proper is quite expensive. You’re looking at $2.5k+ for a 2 bedroom. Rule of thumb is housing should be <30% of pre-tax income to not be financially constrained. Prices are somewhat lower as you move away from Boston, but stay surprisingly high on the commuting corridors. I.e. if you’re close to a highway or commuter rail line, it’s like you’re close to Boston.

As a place to live Cambridge is delightful, except for the housing costs which range from infuriating to life threatening depending on your income :)