Jan Brzeski stands in a sun-filled, beautifully refurbished living room high in the Hollywood Hills, looking out at a swimming pool and, miles (km) below, stunning views of Los Angeles.

Brzeski is a private money lender running an investment firm in Los Angeles that provides loans to house flippers - investors who buy a home, refurbish it, and sell it at a profit. Many flippers turn to money lenders because they cannot get banks to provide such short-term, quick financing.