The two worlds of Marc Kulick, an Oklahoma-based developer and former high-stakes gambler, have collided to create a vicious onslaught of lawsuits, including racketeering allegations, and foreclosures. Kulick is being sued by business partners and investors after defaulting on high-interest loans he took from Efraim Diveroli, the convicted felon and former arms dealer who inspired the 2016 Jonah Hill comedy War Dogs. Diveroli responded by placing second mortgages on all of the properties in the portfolio of Vesta Capital, the multifamily firm Kulick started with partners in 2017. Since then, management was replaced at 10 properties in Tulsa, Oklahoma, by Diveroli’s team with help...