Imagine this: An investor buys your home as a short sale, and instead of forcing you out, allows you to stay in the house as a renter with the option to buy the place back. In many cases, such a deal could land you in jail. Now, it is forming the basis of a business model in the Las Vegas Valley. Real estate broker Dave Dziedzic, founder of RealCore Realty in Arizona, opened an office in Las Vegas this year to launch Housing Angels, which connects investors with underwater homeowners.