PHP Web application for a team organizer (Reg- / Deregistration)

We are a team of 3 who is planning a web application. It should be a software which simplifies an easy registration and deregistration of team events. Since we lack the experience and time to create this software ourselves, we are looking for (a) developer(s). Therefore we need a cost estimate for the following basic functions: • User management CRUD • Teams (e.g. 1st football team FC Zurich) CRUD • Team functions (e.g. goalkeeper, defender, …) CRUD • User team assignment with a specific function (e.g. Andreas Kradolfer plays as defender in team 1st team FC Zurich) CRUD • Team tasks (e.g. washing of shirts) CRUD • Create/modify events for a team (e.g. football game on 12.12.2022) with different tasks (washing shirts, bring beer, …) and different functions (max. 2 goalkeepers, max. 6 defenders, …) CRUD • Users of a team can subscribe or unsubscribe incl. reason and guests (e.g., I participate on 12.12.2022 and do not take any guests) CRUD • Documents, links and news per team CRUD • Creation of mailings for a team • Billing of subscriptions with an external payment service provider e.g. DataTrans For a good cost estimate, a detailed list is also attached. If the offer is in an expected range, we will describe all functions in detail. Furthermore, some functions are already online in the form of HTML Code: [login to view URL] (User / Password is irrelevant). As technology stack we see the following requirements. This would simplify the operation (however, they are not mandatory criteria). We plan to run on a Hostpoint server in Switzerland ([login to view URL] ): • Apache oder Nginix Webserver • Node.js, Java, Ruby, Python oder PHP 7.X/8.X • MariaDB We work in different jobs (graphic designer/marketing, IT, sales) and have already done some preliminary work. • Scope of functions (Excel-sheet) • Database ERD incl. Create-Statements • HTML pages of the sites (Bootstrap template) • Text for the pages and emails