The acquisition of two objects will be much more profitable from an economic point of view. It all depends on whether you're willing to take the risk. In addition, if these objects are located nearby, then it will be much easier for you to look after them. For example, you can buy two apartments in a complex project that will be located in the same building. From an economic point of view, two apartments of 100(for example) square meters each will bring in much more money than one apartment of 200 square meters. To make sure of this, you can check the websites of landlords.