St.Paul officials are counting on young singles and empty nesters to buy hundreds of new downtown housing units being built near the city's lowertown area. Ground was broken today for the fifty million dollar condominium and apartment development. Located on what's called downtown's 'north quadrant', the development displaces hundreds of surface parking lot spaces. Public subsidies make up a quarter of the project's financing. Officials say downtown housing can't be built without taxpayer help. Minnesota Public Radio's Dan OIson reports.