Your location has Tv transmissions in All 3 Tv channel bands.
VHF low band channels 2 thru 6.
VHF high band channels 7 thru 13.
UHF band channels 14 thru 51.
Examples:
WOCK-CD , REAL VHF low band channel 4 , virtual number (x) ,
http://americaone.com.
WBBM-DT , REAL VHF high band channel 12 , virtual number (2.1) CBS.
WFLD-DT , REAL UHF band channel 31 , virtual number (32.1) FOX.
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Install a antenna that is Designed to receive All of the Digital Tv channels.
Install a Winegard HD7082P antenna above the roof aimed at about 126 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Use a common simple 3 way splitter to connect the 3 Tv's.
Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.winegarddirect.com.
The Tv's Must Channel Scan for the Digital Broadcast Tv Channels , sometimes named the 'Air Channels' or 'Antenna Channels' in the Tv setup menu because the Tv transmissions travel through the air from the transmitting antenna to the receiving antenna,
DO NOT channel scan for cable tv channels.