Email Extraction - 10000 email ids

I would like to get 10000 email addresses of CEOs, VP of Sales, VP of Marketing from a list of companies I provided to you.

Please advise:

1. How long it would take you to do it?
2. What tools will you use to get this done?
3. How long have you been doing this type of work?
4. How big is your firm or do you work alone to ensure a strong quality?
5. What is your fixed price for 10000 email IDs?

We have more than 400,000 email IDs that we will eventually need.