The Real Estate Skinny is a great way to "run the numbers" for a potential investment. An integrated set of forecast and budget tools for the residential rental property investors, it shows the impact of vacancies, appreciation, taxes, and repairs as well as debt service on property's expected cash flow. Many lenders require this type of information while arranging financing.

The license of this software is Free Trial Software, the price is $89.95, you can free download and get a free trial.