Tracking system

Hello !!!

I’m looking for some way to create a cheaper indoor track system for objects. I want to attach my objects with some device that will told to me where they are, and each of them must have an ID.

I found some DIY like that:

http://www.instructables.com/id/Cat-Tra … sitioning/

http://www.instructables.com/id/Indoor- … ow-Energy/

In my researches I also found the possibility of use bluetooth le , NRF24L01+ or RFID, but how?

Are there suggestions on how to create such system? Can someone give me a way?