For a good estimate, divide the house value by 3

180,000 divided by 3 = $60,000 gross income

Good Luck

The best bet is to always look to a lender first. Check with your realtor to get a list of lenders that can help you get pre qualified for a home that will not only meet you/your families needs, and that you feel comfortable with the monthly mortgage payments.
Your debt to income will factor in as well.
This is never a cookie cutter answer and it can vary with each buyer and buyers situation.

Your most accurate answer will come from a lender. However, as a general rule of thumb, if you had no debt the cost of your monthly mortgage, interest, property taxes, and insurance should equal no more than about 31-34% of your gross monthly income. To get the cost of your monthly mortgage and interest you'd have to know what interest rate you qualified for and how much the total loan is for. Say the loan was for $180k at 6% interest with about $399 per month for taxes and $80 per month for insurance, that would equal about $1559 per month. 31% of $5000 gross monthly income is $1550. Hope this information helps. If you get to the point that you want to speak with a mortgage professional I can give you a few referrals to local lenders that my past clients have been satisfied with and I can help you with purchasing a home.

That is a good question with may variables. First suggestion would be to talk with a lender. If you do not have one, get a referral from family or friends. The variables are your income, credit (FICO) score, debts and down payment. Based on this you will be given a range depending on the type of financing that will suit you. Good luck.

You need to talk to a lender because it will depend on your income to debt ratios, down payment, credit score, etc... You are going to get a lot of referrals for lenders but buyer be ware. Luckily, mortgage brokers are regulated in Texas. Get a least 3 opinions from reputable lenders/banks and if possible get at least one quote from a bank you already do business with. Any lender/bank should be able to pre-qualify you quickly.