If with your new service the receivers work with SWM.
The dish on the MH may not be SWM ready. But you can buy kits on eBay cheap to covert the RV dish to a SWM.
I have a Genie HR34, HR23 and a H25 in my MH.
DirecTV has them as located at a residence mailing address.
All 3 receive SD & HD programs.
All 3 receivers also get E & W DNS(Grandfathered in) not matter where they are located at.
NO separate DIRECTV mobile account. All on one account.
Less info told/ask of DTV customer service people is better.
In the last 17 + years they have been no federal law officer stop by and check what channels I get.
Not that your experience is different is wrong.