I have extensive experience with Google Sheets and Google Apps Script, and would be happy to assist you with this project.
Based on your requirements, I understand that you need the ability to convert selected range or filtered data to PDF, with the PDF file being automatically saved in a specific folder. You also require the PDF to be emailed to you and saved in a format similar to an invoice with the client's name.
I am familiar with automating file saving and different naming in Google Sheets, and have knowledge of PDF generation in Google Sheets as well. I am confident in my ability to provide a high-quality solution to meet your needs.
Please let me know if you have any additional requirements or specifications for the project, and I will work diligently to deliver quality results within a reasonable timeframe.
Thank you for considering my proposal, and I look forward to working with you.