Tempertur reading from Mavrick 732 (BBQ termometer) wireless

Hello have somebody make similar project like this AskGeek.io
with Arduino Nano V3.0 and Ethernet Module for Arduino
q, how big are the diffrent from C for Pic to arduino.
This system read signal from transmitter and you can read this on computer or smart phone.
Better range on wireless internet

Best regards Henrik

how big are the diffrent from C for Pic to arduino

Quite big.
It depends on how much experience you have with both Pic and Arduino.

I have no experience with Pic, so I would say this would take many 100's of hours of work

It would probably be easier to start again from the beginning on the Arduino, than to attempt to convert from PIC
(Especially as uses 3 other libraries as well as the main code)