Because you have 6 plus tv locations. It's time to step back and re evaluate again. #1 the receivable tv transmissions at your location are Very Weak. #2 the diverse directions of the receivable stations will not permit reception of all directions , south west , south east and east with one antenna. #3 the combining of say 2 antennas on to one coax is not possible due to the diverse channels involved , well it is possible with equipment like the cable company uses , however the price will go over 5,000.00 dollars and keep on climbing. There are some profesional consumer grade channel inserters / combiners , how ever the price will easely go to 2,000.00 plus dollars. #4 the 6 plus locations of tv's will not permit the use of a antenna and rotor because conflict will develop about what direction the antenna is pointed. . . . ->To Make It Easy <-> To get you going with broadcast digital tv reception I recommend one HD7698P antenna aimed at about 245 degree magnetic compass for the USA stations , the antenna Will Need to be mounted up high above the roof , not snuggled to a wall of the house. I also recommend a 8 way Channel Master CM 3418 distribution amplifier. Here are some antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html. Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.starkelectronic.com ,
http://www.3starinc.com ,
http://www.winegarddirect.com ,
http://www.channelmasterstore.com