I have a 2-story house with the antenna on top (obviously).
There is no single point earth ground within single digit feet.
So, if I used a single coax line grounding block like below, it would have to be mounted somewhere inside the house so that I could tie into a single point earth ground (like a copper pipe).
There are vents from the bathrooms & kitchens that come up through the roof, but the bedrooms & kitchen are on one side of the house; the living room is on the opposite side and certainly not within single digit feet.
Where does that leave me?