MC Salary not enough for Boston

In case someone can point to me a financial trick that I'm missing: I just started a MC Global Felowship, the beneficiary is a German university and the partner organisation is MIT. I have a family, so I need a 2 bedroom apartment (I wouldn't be allowed to rent a studio even if I wanted, not to mention a room in a shared apartment). Anywhere in a radius of 1.5 hours by public transportation from MIT, it is difficult if not impossible to find a 2-bedroom apartment for less than $2000/month (if you want to live at a reasonable distance from MIT then it is more like $2500). Now, I get my first salary in Germany: 2300 EUR. It seems that this is the gross 5700 EUR/month minus a 55% tax+pension+health care+etc (that's the explanation I get from my German university, although they seem not to be very good with math, as you may infer). The bottom line is: my salary is obviously not enough for me to stay in Boston. MCSAs are very competitive and prestigious fellowships... what am I missing? I hope you can acknowledge the gravity of the issue.