Even though you might make a lot of money by developing properties and flipping properties, these methods require a lot of investment. The best way is buy property and then rent it out.
You can manage real estate investment through maintenance. You need to be careful about allowing any scrap but make provision for maintenance always in order to keep it sound and good. Also, ensure your investment is managed well to bring forth profit.
You can manage your real estate investment by doing the following : delegate responsibilities, prioritize tenants needs, build an emergency funds, digitize records, automate your applicant pipeline, invest in landlord insurance, use property management software, etc.
Managing a real estate investments depend on the actual type of investment you are reffering to , for example if you build a hall which people will be renting, then you need to put some people in charge of the business.
One of the best ways to manage your real estate investment is through constant supervision. Always monitor your properties to ensure that they are in good shape. Cause an apartment that is not in good shape would be very difficult to get people to buy or rent it.