Single, but Laying Down Roots By ABBY ELLIN Published: January 18, 2004 VIRGINIA WOOLF was wrong. Women don't need just a room of their own. They need an entire home. Many young single women are reaching that conclusion. As they earn higher wages and delay marriage, more of them are realizing that equity-building is not just smart but also essential - and that real estate is often the wisest way to do it. The National Association of Realtors in Washington reports that single women accounted for 21 percent of all home purchases in 2003, up from 18 percent in 1997....