For US homebuyers, there's only one choice, or so it seems

For decades, buying a home was a key step on the path to financial security for the American middle class. Home owners could count on a fixed mortgage payment rather than rising rent, take advantage of tax breaks, and build equity as their houses increased in value over time.

But with home prices falling and families losing their homes to foreclosure, some people, who under other circumstances would be looking to buy their first home, now see greater security in renting.

One such person is Lisa Chesnut, who lives in Tucson, Arizona, and works as an information systems coordinator. With a good job and two young sons, 29-year-old Chesnut and her husband, Bryan, look like classic first-time buyers.