Dear Sir,
I have read everything and checked the PDF document, so what I understood is that you want to develop WordPress plugin to manage calendar and timesheet data as well as need to integrate some APIs.
For now, I do not have an questions, as you have very clearly defined everything but when we get into development phase, then my team may ask few questions, which is normal process of work.
I have also discussed with my technical team lead to make sure that there are no issues, so we are good to go & ready to start this project immediately. Please let me know how do you want to proceed, as I can also give you our team high level understanding paragraph to make sure that we are both on the same page in terms of requirements understanding.
Just so you know I am flexible in prices, as quality & long-term relationship is more important.
Look forward to hearing from you.
Regards,
YK
LEADconcept
PS: Please let me know, if you want to see some of our recently designed/developed Web Applications, as we have a long list, I can then provide you URL of client side and Admin Side along with user/password.