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Property investment business? - japan property investment

How do I run a company working as investment property to. Do you have a mortgage on each property that you buy if you have not started a lot of money.
The country, which I believe to buy the property we are in the United Kingdom, United States, Canada, Barbados, Germany, France, China, India, Hong Kong, Japan, Australia and Russia dubia.
Is it difficult to run a real estate investment company.