I don’t know what a tailgater is but we have dish in town - which I love - and maybe they can help.
A tailgater is a portable automatic Dish antenna. It currently requires a 211x or z receiver to work. $300 new. No other fees. If you have a 211 receiver at home you are in business. Dish would never know.
But I’ll leave that decision to you.
And there may be network/ local channel issues depending on the location of the off grid property.
There are lots of helpful tips on the RV boards.