You should study companies and their real estate portfolios. There are a number of companies sitting on vacant properties that are intentionally unused. As an e

You should study companies and their real estate portfolios. There are a number of companies sitting on vacant properties that are intentionally unused. As an example, most pharmaceutical and chemical companies have large unused facilities that sit empty while the company is churning out billions of profits a year. The main reason is that these sites are contaminated and the companies are afraid of liabilities from selling the properties. Funnily enough, this is exactly the first hurdle the article says the federal government faces in selling their properties. Guess the corporate world ain't that different.