Dear Sir/Mme,
I find the job very interesting and challenging, and it would be a great pleasure doing business with you.
It would take me 7 days to get the job done and rendered in the format that best suits your needs, hence, I would highly appreciate advising available material you have in hand and I'll revert to you in case of any inquiries from my side. Again Sir it would be a great pleasure dealing with you.
Best regards,
Ayman