San Antonio ISD wants major concessions — including the construction of at least 1,250 affordable housing units — before it will sell the land a developer needs to build a $160 million stadium for the city's minor league baseball team The school district outlined its demands in a document sent Wednesday to city officials and real-estate developer Weston Urban, which is behind plans to develop the San Antonio Missions' new stadium. Those demands also include construction of a new building for the district and annual payments to cover lost revenue.