like EarlyModernGermany said, you also receive a stipend for travel--maybe €500 or so from east coast? More if you're coming from the west coast. Whatever it is, it won't be enough to cover the whole ticket. I did this a few years ago in a different city and found my own accommodation, saving quite a bit of money, as the language center's lodging rates were in my case pretty extortionate. (They just give you a huge wad of cash when you arrive, it's pretty funny, very Scarface.) But otherwise, you're correct--the grant does not make any allowance for meals and other incidentals. I think most people who receive this grant are still on their regular graduate student stipend from the US, allowing them to cover their costs. You should be able to find a place to live in Berlin for two months that will help bring your budget under control!