web application using Python

I am looking for a developer who can help me create a web application using Python. I have an existing Python code that can change a user's singing voice into a celebrity's voice. Now, I want to turn this code into a web app where users can upload their audio files, select a celebrity voice, and get the processed audio as output.

I'm looking for someone with experience in web development, specifically in building web applications using Python. The app should have a user-friendly interface that is easy to navigate and should be able to handle multiple audio file formats.

The app should also include payment integration using Stripe and PayPal. Additionally, it should be able to run on low-end GPUs and CPUs.

If you think you have the necessary skills and experience to build this app, please send me your estimated timeline and cost for the project.

Thank you.