Greetings,
I have read Project Description & understand the initial high level details but to give you our estimate, we really need more detailed requirements or you may drop me a message thru' PMB to start our conversation, as our current bid is just a placeholder since Freelancer requires to submit the proposal but once you respond us, we can then finalize it.
Apparently, it looks difficult to deliver in 4 weeks, because this seems to be a big project but we can discuss more in depth, whenever you contact us.
Look forward to hearing from you and talking to you further thru' Freelancer private message board.
Regards,
YK
LEADconcept