1x8 hdmi splitter

Solution
It will depend on your budget, the resolution of the TVs and whether they are the same resolution. An expensive pro unit is more likely to work with the long cable runs that you have.
https://www.bhphotovideo.com/bnh/controller/home?O=&sku=1161306&gclid=CITF8sWV3c8CFRdahgodeG4Pmw&is=REG&ap=y&m=Y&c3api=1876%2C92051677682%2C&A=details&Q=
http://www.markertek.com/product/kr-vm8hdmi/kramer-vm-8h-1x8-hdmi-distribution-amplifier?gclid=COfNn9OV3c8CFQpahgod9YYNlg
http://atlona.com/product/at-hdda-8/
http://www.keydigital.com/items.asp?ItemCode=KDHDDA1x8&Company=KEY
I would connect all the TVs and cables to the unit before running the cables. You might avoid a lot of frustration that way.
You may also need a way to operate the source from all...
It will depend on your budget, the resolution of the TVs and whether they are the same resolution. An expensive pro unit is more likely to work with the long cable runs that you have.
https://www.bhphotovideo.com/bnh/controller/home?O=&sku=1161306&gclid=CITF8sWV3c8CFRdahgodeG4Pmw&is=REG&ap=y&m=Y&c3api=1876%2C92051677682%2C&A=details&Q=
http://www.markertek.com/product/kr-vm8hdmi/kramer-vm-8h-1x8-hdmi-distribution-amplifier?gclid=COfNn9OV3c8CFQpahgod9YYNlg
http://atlona.com/product/at-hdda-8/
http://www.keydigital.com/items.asp?ItemCode=KDHDDA1x8&Company=KEY
I would connect all the TVs and cables to the unit before running the cables. You might avoid a lot of frustration that way.
You may also need a way to operate the source from all the TVs too.
 
Solution