Freddie is busing potential homebuyers to tour affordable housing properties in Chicago as a way to reach low- to moderate income borrowers and unload foreclosed homes in the city.The event, to be held on Sept. 17, is sponsored by the GSE’s HomeSteps real estate unit and the Chicago Urban League. It will include tips on buying foreclosed properties.HomeSteps is the mortgage giant’s program to sell foreclosed properties. While the program is available across the country, it offers special financing for buyers in only 10 states: Alabama, Florida, Georgia, Illinois, Kentucky, North Carolina, South Carolina, Tennessee, Texas and Virginia.