Hello,
This project is generally a day's work. However I will need some more information in order to give you a more precise offer of the time and money.
In my past I dealt with Arduino based systems from quadrotors trough 3D orientation, wireless communication, audio (WAV and MP3), Ethernet protocols and communication, motor drivers, servos and many others.
The chance this project to do me some problem is minimal. And if you choose to, I will give you precise time for execution of every single task.
If you have any more questions, please contact me through Freelancer.
Best Regards,
Mihail Vrachanski