Most cost effective source for residential wire and conduit?

They may be installing a "Repeater" that grabs the signal, sends it around the corner and on to your house. To get around the hilly terrain for a line of sight shot to your house.

We powered up a small town in Arizona, Queen Valley that had all kinds of hills and terrain.

We did that off an 8 Mbps media com cable source, sent it up through a router with wifi antennas, then grabbed the wifi signal with the parabolic dishes at the homes. All on Wifi over the air.