Location tracking indoor unity

We are a small game studio and a client of ours would like a Pokemon go style app for their event, however their event is indoors with 2-3 floors

It seems like beacons could be used for this, i.e. we place beacons around the venue and create a 3d model based on the floor plans and we can track the players location around the event/3d model

Is this something your sdk would allow us to do in unity for android and iOS?

No, sometimes this will not allow.