I like the statement of "Most Timing". Maybe that is what we should call what we do. We bought off the lot and did not order. Therefore ours came with a King Receiver on the roof. We have it hooked up to DISH. Very satisfied with the service. We carry a Winegard Tailgater, that we used on prior trailers before buying our Seneca. We use this when we are under trees, in locations where there is not a clear line of sight to the southern sky. I had to do some custom wiring to remove the 'booster" from the coax run through the Seneca, so it could be used for the satellite DISH connection. A little time consuming , but achievable, once you understand the theory.
Best of luck with your dreams, you'll be amazed as to how much fun you can have.
We've ended up with the "Dish Outdoors" plan and it meets all our needs.
Ric and Jan Golding
2016 Jayco Seneca 37FS
2016 Chevrolet Traverse
2018 Cheverolet Silverado