Most cost effective source for residential wire and conduit?

Is it WI-Max as your internet service?

We have those around here, they shoot the signal off a water tower out of the local town, then you grab the signal with a small dish on the side of your house.

Need to have line of sight though, no trees blocking it.

If it is an actual WIFI signal, you can grab that too.

Is it 500' to the actual source of the signal?