The mortgage per month would be about $960 before taxes and insurance. Find out how much taxes and insurance are on the property. Add the two together and divide by 12. Then add that number to 960, and that will be your monthly payment.
I couldn't tell you what you can afford because I don't know what other debts you have (credit cards, vehicles, boats, child support, etc.). I would suggest writing EVERYTHING down on paper - all of your expenses...including gas, food, car insurance, average money spent on going out, etc...then add in the mortgage payment and see how close you get to what you actually make. You don't want to stress yourself out living paycheck to paycheck, so be careful! At the same time, if you can afford a house, it is a better investment of your money than renting an apartment or house.
Good luck to you!
I used www.bankrate.com to figure the mortgage payment. Just click on "calculators" at the top of the page.