Buying a home is 45% cheaper than renting, on average, in the nation’s 100 largest metro areas. The biggest gaps are in Detroit, where home ownerships is 70% cheaper, and Gary, Indiana, and Oklahoma City (both 63% cheaper). The smallest gaps are in Honolulu (24% cheaper), San Francisco (28%) and New York (31%). The comparison includes costs such as mortgage payments and taxes versus rent payments. The complete list is at http://Info.Trulia.com/RentvsBy-Summer2012.