Hello!
I am ready to help you with your task!
I already had alike experience - developing from scratch responsive web-based CRMs/Dashborads for different companies using PHP+MySQL+jQuery+Bootstrap3+GoogleAPI.
- Bookings keeping
- bills and invoice making
- managers accounts managing
- Google Drive files upload
- invoices, reports, contracts and other docs in PDF/CSV, charts and etc
I can send you screenshots of the system, I guess it's similar to what you need
You can also take a look at my portfolio.
Please do not hesitate to contact me via messenger!