Try the STD Cable TV cable first. It is not the best but is an inexpensive starting point.
Be very careful with the N connector on the coax cable. The Antenna uses a 50 Ohm N female.
The cable should use the 50 Ohm Male version. (The 75 Ohm has a smaller pin that may not connect properly).
There are plenty of online sites that either carry pre-made cables or will make them for you.
Here is a nearby site http://flightaware.com/adsb/stats/user/jonreily to give you an idea of likely range.
Don’t forget lightning/static protection. I have a 1000ft bridge and multiple 6 story apartments need me so I am pretty safe.
Set your receiver location(you can set the public viewing granularity separately) so that MLAT will work.
You can use a smartphone, GPS or a mapping program (google earth. yahoo maps etc) to get the precise location.
You may need to restart piaware after it is set so that piware picks up the new setting. This will allow you to see aircraft that do not send their positions(older Mode S transponders).