Please find attachment and read carefully and then give me price with time, i need main features list and plan what you will do so i can see that you understand my requirements.
I have read the file entirely. Do you have a reason for using adobe air? I would wish to suggest a web approach to this project. You have a lot of social integration in this... of which all members use websites.
I mean if your target users use websites? why not use that also?
Then build cross platform mobile applications for this also. That would allow more user integration rather than using just a desktop platform.
Please check my feedback and portfolio. I have done awesome work in the past.