you can invest at real estate if you have more money but the interest of real estate i think only 10-20% /year and you need some "fee" to maintain and keep the place, also pay the maid and gardener to maintain cleanliness. 
During the 2008 recession, real estate prices in regions such as Dubai and Hong Kong declined by as much as 80%. So there is no guarantee that real estate will give a return of 10% to 20% per year. Also, taxes can be a major issue in some of the countries. For example, property tax and land value tax in the United States can account for as much as 4% of the value of the property per year.
It just requires some C.A's and lawyer's to get you pay the least taxes and effort around.