Big aerials have their place in extreme fringe areas where a whiff of signal needs as much as possible,including very tall masts and guy ropes to hold it in place.
A big televes aerial is a good 7 ft long and stands out like a sore thumb,where as all you need is a much smaller aerial and a good low noise amplifier.
Big aerials like this are usually sold by over enthusiastic salesman up selling and trying to get the maximum profit out of a job,but that big aerial impressive as it looks is also going to seen by the customers neighbors who will give it a name "monstrosity" and your image and reputation will take a nose dive as a result.
We don't ultimately sell Tv aerials but TV pictures,it is only us tv aerial guys who go round admiring aerials,if we went into the pub banging on about log periodics and interference rejection we would get thrown out,and get told to shut up.
If your house you have just moved into resembles a radio telescope let us know we can help you out.