How much house can I afford?

I know there are online calculators dealing with this question. But I believe my situation isn't cookie cutter, so I would appreciate any input on the subject. I am looking into buying later this year and I'm now trying to figure out how much I can afford, and if I will be approved for a loan. I have been in the country for three years (I have a green card), but I haven't seriously worked on... [more]

I know there are online calculators dealing with this question. But I believe my situation isn't cookie cutter, so I would appreciate any input on the subject. I am looking into buying later this year and I'm now trying to figure out how much I can afford, and if I will be approved for a loan. I have been in the country for three years (I have a green card), but I haven't seriously worked on improving my credit score. I have only had one secured credit card since 2008, and no other loans or mortgages. But I have always paid my bills on time, and haven't done anything to worsen my credit. I don't know my credit score as of this time. I made $225,000 in 2008, $590,000 in 2009, $160,000 in 2010 and will receive $1 mill for 2011 and $700,000 for 2012. I don't have any savings, but I'm planning on using a lot of my money this year to put down for an apartment. I was thinking $500,000, but I don't know how much for sure as I of course also need money to manage the mortgage. How do you people think the bank is gonna look at this? Will I get a loan, and if; how much? [less]