I've 5 years of experience working as SAP business intelligence consultant developing reports in Crystal Reports, SAP Dashboards, and as part of my exprience I've developed the UI of a sales portal product in SAPUI5 for my enterprise.
For to develop successfully this project we can follow te steps below:
1. Send me the structure of the services to cosume with the SAPUI5 Interface
2. Test Sending paramethers to the service and validate the response
4. Create the SAPUI5 View for display data
3. Implement the final solution
The time proposed of resolution depends of the systems you have implemented I mean Developing, Quality and Production
If you are interested with my services a appreciate contact me for analize the whole requirement