After a half-century in the real estate business, Joe Cosenza is as enthusiastic about dealmaking as ever. Since starting The Inland Group of Real Estate Companies, Inc. in 1968, Joseph Cosenza and three fellow schoolteachers have built the Oak Brook, Ill.-based firm into one of the nation’s largest, most diversified commercial real estate investment companies. Inland Group is a launching pad for a wide variety of investment vehicles: limited partnerships, listed and non-listed REITs and institutional funds. All told, Inland owns and manages 77.4 million square feet of real estate in 49 states.