…Gureghian and his attorney wife, Danielle, are planning to build a 20,000-square-foot mansion, complete with a two-lane bowling alley in the basement. Among his business 'nterests, which include a billboard company, Vahan Gureghian is the founder and CEO of CSMI, a management and consulting firm for the charter-school industry. The company also runs a large charter school hat he founded in Chester, Pa., more than a decade ago. Politically well-connected, Gureghian served on the…