Develop fitness training platform w/ calendar and payment

Development of a user platform, with the possibility of different language versions and the following functions: register, login, user profile, different types of users (free and paid), payment functionality (Paypal), calendar per user, automatic email reminders of calendar events to users and statistics of user data. The platform manages fitness and trainings data of users. Please see attached file for detailled specifications. I am looking to find a developer that is experienced and is able to built a first version quickly for a budget aof 1000 EUR and extend it step by step (for extra payment). You can suggest a way of implementation and the programming language that suits the needs best. Thank you.