PAN Network with MRF24J40MB / PIC

Hi Guys. I want to build a PAN (personal area network) with my sensors. PAN network will be made with one coordinator (receiver) and 3 devices (sensors). The network is needed to control the sync and the data. The receiver and the sensors are build with the transceiver MRF24J40MB and PIC's. Each sensor made with the transceiver and a PIC16F1825. The receiver made with the transceiver and a PIC16F777. The receiver should tell the sensors when to transmit and they should go to "sleep". When the time passed the sensors should start transmit the temperature without interrupting each other. Then, they should go to "sleep" again until the next time arrives. I will send the circuits to the chosen bids. This project should be done in a week, so if you can't do it please don't post a bid. The budget is not so high, so don't post the maximum too. Thank you.