Concentrating your properties into one certain region can actually put you at risk to mother nature. Earthquakes, Floods, Fires can take all your properties and leave you to answer to the banks while asking your insurance company for help. After you have acquired many properties think about spreading your properties to other States or Cities within your state. Example, Have few properties in San Diego, CA and thinking about purchasing another. Well why not purchase a property in Big Bear, CA or Lake Tahoe, CA area. Phoenix, AZ is another hot real estate area and equity is rising in that desert land.
It is always a good idea to have contact with several real estate agents and loan officers who could maximize your financial opportunity. Different real estate agents should be able to bring you different types of property investment opportunities. Different loan officers will be able to provide you the best financing options depending what property your are trying to purchase or refinance.
On top of risk from natural disasters, overinvesting in a single market may expose you to microeconomic factors, such as a reliance on specific industries or even specific companies in their capacity as employers for your tenants and buyers. In today's dynamic business markets, with large scale outsourcing and drastic changes in hiring and operating strategy amongst major employers, as a savvy investor you would be best advised to increasingly diversify your real estate portfolio to include different regions, and you might consider refinancing some of your current holdings and taking cash out to facilitate diversification into new real estate markets across the USA and in hot international markets.
You can also diversify your Real Estate Portfolio by investing in different types of properties. You may want to have some longer term investment properties, such as rental properties. You can also invest in mid term properties. These would be properties that you buy and keep for a year or two then sell because of the increased market value. There are also short term property investments such as rehab projects. Where you buy a distressed property, rehabilitate it and then sell it.