I assume you own no other REIT commons. If that is the case, you might want to chose between O & KIM and buy only one of them as they are both retail REIT's. Might want some diversification, so buy a residential, hotel or healthcare REIT instead. Also Healthcare REIT's generally pay relatively high dividends (since you said you wanted an income stream). You also might consider buying Vanguard's ETF (VNQ) instead of three REIT's for even more diversification.
Norm