Android Doctor Finder App Build

I have sourced a complete Doctor Finder App from CodeCanyon, with the source code readily available. However, I'm encountering challenges in building and compiling the project. I'm seeking a proficient freelancer who can:

- Successfully build the app from the provided Android source code.
- Ensure the app is functional, free of bugs, and ready for deployment.
- Execute minor design tweaks as necessary.
- Provide a walkthrough or concise documentation on how to build it in the future if needed.

Ideal candidates for this project should have:

- Extensive experience with Android app development and deployment.
- Proficiency in making minor design adjustments.
- Excellent communication skills for providing clear, understandable documentation.

I would appreciate insights on the expected timeline and cost for such a project. Thank you.