Chris J,
This guy was part of a very large commercial real estate investment firm and this alone could be the reason why he does not expect to get the type of ROE that I or other investors expect and I'll explain.
1. There are different property classes (4) within real estate. You've got class A (the best), B, C, and D (obviously the worst). These classes are determined by the age of the respective properties, the condition, and the amenity items expected by the market. Most LARGE investment firms are called institutional investors and typically these guys compete for class A properties because they command higher rents, have lower maintenance costs (due to the younger age), and they are much easier to manage. With such properties it is a little more difficult to achieve the ROE that one might be able to get in any of the other property classes.
This has to do with the risk and the advantages associated with that particular property class.
2. He may not expect the bargain that I or some of the other investors expect. And who says that this large investment company hasn't made some bad decisions. Look at Lehman. Big doesn't always mean smart.
3. To reiterate what has been said earlier, the ROE formula can be manipulated by adjusting either the Down Payment/equity or the cash flow (which you can only be calculated after the debt service so the argument over the consideration of financing is a moot point). Maybe this large institution goes at it all alone with no investors, partners, etc. and this is why they have a hard time getting a 20% ROE. Maybe a smaller down payment on the companies part and bringing in some debt partners would make 50% possible?
4. Real Estate is hardly monolithic. Maybe this guy is investing in San Francisco, CA when I invest in Roanoke, VA and William Barnard invests in Oklahoma City, OK. In other words, maybe in his particular market of expertise it is extremely competitive and thus impossible to find properties with great ROE's. If that be the case it does not mean that HIGH ROE's aren't achievable it just means that they are not achievable in his market.
5. Asset type is also a worthy consideration here too. Maybe he only invests in apartments that coupled with the his geographic location of expertise could keep him from achieving a high ROE.
I think that I may be beating a dead horse here. But I will ask you a question: Have you established why COC/ROE is an important staple within your personal investment criteria?
Commercial Real Estate is a game of assumptions. There is no law here and there are no impossibilities. NEVER forget that. As Trump would suggest there is an ART to the deal.
Lastly, there is an inherent difference between ROI and ROE. They are not the same. Look it up when the chance arrives.
Good luck.