Then, talk to a lender and find out the other issues you may or may not have personally.
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There are many factors that go into financing a purchase the three big factors are....
1- Capacity- Your ability to repay, meaning your income. The lending institution will also look at homw much of that income is tied up with other consumer debt.
2- Credit- Your credit is more important than ever and it is important to have a moderately good credit score.
3- Collateral- How much money are you putting into the transaction. Not only down payment, but closing costs and reserve funds.
The best thing to do is contact a lender and discuss where you are at and they can tell you how much you can afford.
But to get a more accurate number based on your particular situation contact a local mortgage broker or officer at the bank.