Borrow what you can afford to repay
When people buy homes, they often "stretch" to make their initial monthly payments, on the theory that their incomes will go up over time, making house payments easier to cover.
But it's smarter to live within your means. You can move up to a more expensive house after (and not before) your income rises. A conservative rule of thumb is that all of your monthly debt obligations, including the house payment, shouldn't exceed 36 percent of your income before taxes.
Let's say your household income is $5,000 a month: The monthly house payment, car payments, student loans, credit cards, child support and other obligations shouldn't be more than $1,800, or 36 percent of that $5,000.
Now, if you have a high credit score and will have plenty of money in the bank after you close on the loan, the lender will be willing to let you accept a higher house payment. But if your debt obligations are well above 36 percent of gross income, you won't have much money left over to have fun and save.