Plenty of cities are nice places to visit. But did you ever wonder what it would cost to buy a house there? HSH.com looked at mortgage rates and median home prices in 25 of the country's largest metropolitan areas to determine how much salary you need to earn to cover the principal and interest payments on the average home. Here are the 10 lowest metropolitan areas -- some of them may surprise you! See the full list plus HSH.com's methodology here.