Key aspects that would allow us properly understand your requirements and provide a precise estimate:

1. A detailed description of your request with main functionalities to be provided
2. Any development constraints (eg. "I need this done in max. 1month" or "I need this done in PHP")
3. The budget available - this will save time on both ends.
4. Any similar solutions already available for better understanding of your request.

* please allow 2 business days for a reply, Thank you.