Daryl Carter was a Los Angeles Clippers fan long before Steve Ballmer bought the basketball team. Carter’s seats near the Clippers’ bench were just down from Ballmer’s, the former Microsoft chief executive with a net worth of more than $140 billion. The two soon bonded as sons of Detroit and the auto industry. Carter, founder and CEO of Avanath Capital Management, an affordable housing investor and operator with about $4 billion under management, took Ballmer and his wife, Connie, to tour Baldwin Village, the 669-unit apartment complex Avanath bought three years ago. He says the property, which appears in the Denzel Washington crime thriller, “Training Day,”“is not as menacing as its looks in the movie.”