Greetings,
We have read high level requirements and this seems to be a big project but before giving you our final/firm estimate, I would like to schedule a meeting to discuss the overall scope of work, as for now our bid is just a ballpark estimate, so you may ignore it.
Please let me know, if you want to review some of our past work as I don't want to bombard you with lot of links at first place.
Look forward to hearing from you and talking to you further thru' Freelancer message board.
Regards,
YK
LEADconcept