Fire stick/ DirecTV app

First question?

I have 3 TV in my household  and we all have fire stick ,can we all watch DirecTV at the same time?

Second question?

If I get package " Choice "  and want to watch The Longhorn Network at the same time on different TV's  would that knockout one of the channels on the different TVs? 

Third question? Notice on the channel package It says " Longhorn Network channel, region channel determined by location. Is it speaking about the area code? My area code is 512

Hope you can answer these questions before I decide which package I would like to pick. 

Thank you.