Dear Sir,
I have read your project description & understood the initial high level requirements but may I suggest that we schedule one to one technical meeting to discuss everything more in depth, as it is important to make sure that we are both on the same page in terms of requirement understanding, after that we can finalize everything to kick started.
Please start the chat thru' private message board to discuss more in depth, so I can give you my high level understanding to make sure that we are both on the same page, I can then also revise our bid.
Look forward to hearing from you.
Regards,
YK
LEADconcept