Hi Oleg, I specialize in commercial real estate and investment sales. You have some very good questions, and I will try to give you the best perspective I can in this short message. Firstly, when you say income capitalization analysis, I am assuming you mean cap rate, which represents the acquisition year NOI. If you mean the projected rate of return, then that is IRR. Anyways, the only way to find the actual total NOI for a specific property is by getting the rent roll from the landlord. Every property is different and that is what cap rate is for. For example, a retail shopping center can have various forms of income, base rent, percentage rent, etc. The increases of which, are dependent upon the exact clauses in the leases among numerous tenants. There is no way to just assume an average NOI. OE on the other hand is much easier to get rules of thumb. Property management and utility companies have this....but. It is dependent on the property type. The OE for an apartment building is much different from an Office building. Choosing an appropriate cap rate is very much a market analysis, and only one piece to the puzzle. Cap rate is a very fickle metric and depends heavily on the portion of NOI that you are calculating. To add, there are many different types of cap rate. My best advice, if you are doing this for investment purposes, align yourself with a "commercial" broker in your area. We live for the heavy lifting in these matters. While it is important to understand them in general, it is a very deep ocean to swim in and the juice may not be worth the squeeze!