Custom Ride-Hailing App Setup

I'm looking for an experienced developer to customize and set up my ride-hailing app.

Key Customizations Needed:
- User Interface Design: Create an intuitive and user-friendly interface WITH MY BRANDING
- Payment Integration: Setup secure payment gateways. STRIPE
- Map Integration: Implement accurate and responsive maps for navigation.
-Set up HOSTING AND TEST THE APP
- PUBLISH THE APP ON IOS

Technology stack: Please refer to the links I've provided.

Ideal Skills and Experience:
- Proficiency in my preferred tech stack.
- Strong background in UI/UX design.
- Experience with payment and map integrations.
- Ability to work within a budget and meet deadlines.

I bought this source code for my taxi app:

https://codecanyon.net/item/ridy-flutter-full-taxi-solution/34659003

and I need it set up and customised to my colours and my brand.

Here is the instruction link to set it up: https://flutter-docs.taxi.ridy.io/

I also want to understand the maintenance costs of this app, if you can tell me the cheapest way to host it etc. I will only be making it for IOS and web (only if needed on Web)

Looking forward to your proposals!