First L.....You can and will get a lot of answers to this question.
As a US Citizen you have many choices to invest in America, still the finest country in the history of the world.
You investment choices will be based on the risk of the investment. The more risk that you take with your commercial real estate investment, the more return you can expect. For example you could invest in a commercial property that is leased by a national credit tenant, in a class A location and get a return of 3% to 6%. (This is referred to as the canalization rate return on your investment).
Or, on the other end of the spectrum of commercial real estate, you may be able to invest in a property in a Class C location, that requires substantial management and care, and great attention to keeping the property full; and with great success get as much as a 10%+ return on your capital. (Again this is referred to as the cap rate).
The best advice is to find a broker with whom you can establish trust. Explain to that broker what you are attempting to accomplish with your investment. Give him or her all the details of where, what and how in your explanation of a goal.
He or she can then search for a property that fits your needs. Then should then receive "the best" answer to your question.
Good luck and onward and upward!
Nov 5, 2012