First thing is that Hughesnet is a "capped" service in terms of the amount of data you have available.
The items you mention, starting with the TV will eat your limited data allowance very very quickly.
Using your iPhones over your Hughes connection will also eat data but give very poor performance due to the latency inherent to a satellite connection. Your signal has to travel 22.300 miles UP to the satellite, then is retransmitted DOWN to your assigned Gateway server, then any answers need to follow the same path back UP then send DOWN to your modem.
That is a total of 89.200 miles. Your signal travels roughly at the speed of light (186,000 miles per second) so there will be a delay of at least 650 ms.
The third item is Apple devices are the worst to try and "tame" as far as turning off an endless list of updates ... you think you have them and then BAM ! your allowance as been depleated.