We recommend that before you even start looking for a house, you visit your mortgage banker of choice, and find out what price range home you can afford. This will save you time and also position yourself much better as a buyer.
Your mortgage banker is the expert on determining a figure for you, so please ask them. They will be happy to take your information and check your income/debt ratio to qualify you for a certain mortgage amount. Within about an hour, they can qualify you at the exact price of a home with the monthly payment amount that you can afford. You may be surprised to see how much home you really can afford. For a quick estimate, check out the Calculator provided by Realtor.com (opens in a new tab/window).