Comprehensive Web App QA Testing

We are launching a new web application. It is to help hosts manage events. It is a small application (first release) with a form for host to create, share the link, allowing guests to respond. Also there are email notifications. The requirements are not explicitly specified. Tester will have to understand the functionality and test. There is a SQL server backend and.Net application, hosted on Godaddy. Tester must test for security risks, vulnerability, unauthorised access, encryption, confidentiality, leakages, cyber security / penetration. Tester will also have to find out issues with coding standards, cookies, encryption in data exchange to ensure that plain data is not saved or transferred. The application is mobile/desktop/devices compatible. And needs to be tested on those. Tester will have to create and share test plan, test cases, execute, provide result (for functionality, security, other testing types). There is no payment involved in the functionary. Need testing on: functionality, flows, security hardening, API and third-party integrations, back- and front-end performance under load, plus hands-on usability and UX-responsiveness checks on common browsers and mobile breakpoints ------- Note: I need to start the testing in a couple of days. The budget is 5-8 AUD per hour. Kindly respond to this only if you are okay with it.