yale economist robert shiller notes that "from 1890 through 1990, the return on residential real estate was just about zero after inflation." most of us find that hard to believe, but when we factor in phantom costs like mortgage interest, taxes and maintenance, real estate often turns out to be a cost, not an investment. 2. even worse, homeownership restricts our flexibility. whereas we used to live in one place for years and years, my readers, mostly in their 20s and 30s, are increasingly unlikely to buy because they value flexibility above owning property. buying a house can be a great choice for many reasons. but in the largest purchase of our lives, we can't be swayed by simple slogans like "buy to get the tax cut." fortunately, an increasing number of americans are beginning to question the accepted wisdom of homeownership. >> susie: that's "nightly business report" for wednesday, november 10. i'm susie gharib. good nigig i analyzed 1,200 money questions that my readers sent me and found that a full 25% of those in financial trouble traced their problems back to one reason: their