When thinking about getting rental income, the companies that come to mind from the Dream Unlimited Corp. empire are Dream Office Real Estate Investment Trst ( TSX:D.UN ) or Dream Global REIT (TSX:DRG.UN). Well, that's not a surprise. Although, they are all managed by Dream Unlimited Corp., Dream Office and Dream Global have bigger scales than Dream Industrial Real Estate Invest Trst ( TSX:DIR.UN ). But which one should you buy today for a safe yield? Dream Office REIT Dream Office has office property assets worth $7.5 billion, equating to 24 billion square feet of gross leasable area (GLA). About 71% of the REIT's net operating income (NOI) comes from central business districts. Its top 20 tenants have an average credit rating of AA- and include quality businesses such as Bank of Nova Scotia, Bell, Enbridge, the federal government, and multiple provincial governments. Why is it so cheap?