Like stated above real estate and finance in that area and flipping houses, I know in S Philly due to the housing price boom a bunch of them are involved in this area and making a killing legitimately like many people in the US. Flipping houses there or in Florida as many spots is a super lucrative business and also getting the equity off the houses that you are buying. I know this occured in the early 2000s and then that led to the financial crisis as people were fradulently getting loans and then selling and leasing the houses and defaulting on their loans so that seems it could be right up their lane