SINCE you can't GET any of the CABLE channels via OTA that part of the DISCUSSION just confuses things.
He's already got satellite and just wants to USE IT. Since you mention a carryout unit, you can get one of the new Carryout G2 units from Winegard. They run a bit over $600 but they are very small (about 14" tall and wide) and easy to setup and store. They come out of the box setup for DirecTV so it's just a matter of setting the receiver to the correct setting and plugging everything in. It comes with 50' of coax and power cable and you will use the same exterior connection for this that you use with your tripod setup.