Blue Skies and Green Yards, All Lost to Red Ink
First of two articles in series A Home Too Far focuses on middle-class black and Hispanic families lured to Pocono Mountains of Pennsylvania by dream of home ownership only to tumble into foreclosure; lenders have brought foreclosure proceeding againsg 5,700 homes in Monroe County, Pa, in last decade, with thousands more families in area struggling to hang on; one in four minority families in some of fastest-growing townships are using half or more of their gross earnings to pay for homes; interviews with over 100 homebuyers and dozens of finance industry employees and policymakers reveal story of miscalculation, greed, questionable business practices by builders and banks, dismal state regulation and overly ambitious federal policy of encouraging home ownership; map; graphs of rising home ownership and foreclosure rates; photos (M)