From this situation, we have limitations in human resources to take the responsibility in IT. If we implement the physical server for development and deployment of web-based application, we should require several infrastructures rather than staff including space and physical security for the physical server, planning and expenditure for this project. We have to spend time, effort and cost too much for these requirements in this situation. Thus, the cloud server is the appropriate choice to develop this application.
The kind of cloud computing service model in this situation should be platform as a service (PaaS). Because we focus on the development of the web-based application, this service model is appropriate for developers to spend time coding, testing and deploying the application instead of dealing with the hardware.