I'm 25 years old, and I'm seriously thinking of buying a house. But the problem is, I don't have a clue as to how much to put down, and what kind of house I can afford... Like, how much is the monthly payment of a house that's $300,000, with about $3000 down? Can anyone point me to any online resources to learn about this stuff? I live in the San Francisco Bay Area (probably the most expensive place to live in the U.S.), so a $100K - $200K house is not plausible here, and I don't want to move out too far... Thanks!!