Trulia’s latest “Rent vs. Buy Report” shows that it’s still a better deal to buy in the top 100 U.S. metro areas, including the cities that feed the Texas coastal real estate market, but that gap is narrowing as interest rates rise. The report showed that it is 35 percent cheaper to buy a home in San Antonio, 45 percent less expensive to purchase a Houston home and 30 percent less expensive in Austin to buy than to pay average rent in either market. Interest rates in Texas would have to rise above 9 percent for renting to be a better value, the report said.