I would like to hire an Android Developer

I would like to create a school management application. Can you please send me a quotation for developing school android, iPhone application and a website for students information system. Features required is as bellow Daily attendance Exam time table and results News& events Extra curricular Student's individual profile Time table Home work About school About student Survey Teachers profile School calendar​ School bus gps integration, etc Excel to application data integration All these features should be able to upload daily using the management website. All these information should be available on Android,iPhone and website Parents should be able to view the students details using user name and password Our requirements Android, iPhone and website for students data entry with the above mentioned requirements, source code Web/application hosting Please share me the total charges and number of days to finish the above three I already got quotation from around 28 companies and their budget is not suitable for me. It is not a single application agreement. I will definitely give you more freelance works if it is a success. I will come to you for developing all my applications in future also. Currently I am trying to implement this for a single school with 3400 students. Please reply back to me once you go through those. You can include more features and I am ready to negotiate.