Non-Fiction Book Proofreading and Publishing

I'm looking for a skilled proofreader to refine my non-fiction book.

Key requirements:
- Correct grammar, punctuation, and spelling errors in British English.
- Ensure consistency in style and formatting.
- Improve overall readability without altering my voice.
- Format the document to 14-point Times New Roman for readability.
- Obtain ISBN numbers for the book.
- Prepare the book for hard copy publication and provide four printed copies of the final product.
- Assist in listing the book on platforms like Amazon and Barnes & Noble.

Ideal skills and experience:
- Proven experience in proofreading non-fiction works in British English.
- Expertise in book formatting and publishing processes.
- Strong attention to detail and language proficiency.
- Ability to meet deadlines and communicate effectively.

Please provide samples of previous work, a breakdown of costs for these services, and an estimated completion time.