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The implementation of an Urban Air Mobility (UAM) environment presents a substantial challenge, encompassing several factors such as the introduction of a disruptive aircraft concept: eVTOLs. In a scenario characterized by congestion on highways in major urban center, the concept of envisioning a sustainable, reliable, and financially advantageous mode of transportation becomes highly desirable. However, in order to accomplish this goal, it is imperative to comprehend the characteristics and constraints of the novel transportation system, in order to develop a cost model that strives for a sustainable profit margin. Therefore, this study aims to construct a comparative modeling that considers the cost benefits of both fixed-wing and rotary-wing aircraft in a hybrid manner, taking into account the energy requirements of an electric propulsion system. Also, this study proposes an in-depth analysis and comparison of the ownership costs associated with three different eVTOL engineering configurations, in order to highlight the advantages of each one of them. Subsequently, a cost operating model for these aircraft is proposed, taking into account the hybrid behavior presented. As sources of information and comparison, a drone and a helicopter model are utilized to establish comparisons for the vertical takeoff and landing mission components, while a fixed-wing aircraft from the regional aviation group is employed to guide the model during the cruising phase. Based on these results it is possible to draw some conclusions about the potential financial benefits and identify areas where efforts should be focused to establish UAM at an economically viable level.