We switched to Directv's HDTV from SDTV a few years ago while in Arizona. They came on site to the RV park and installed a SWM dish with a metal ground rack. When they left we switched the dish to your own tripod. We had one HDDVR in living room and one HDREC in bedroom. I installed whole home on my own Ethernet hub. We have been taking the small 19" TV from the boat with us in the belly in the winter. We got a new Genie DVR at home so the trailer now has two HDDVR's. The HDREC is at home in the office, but can travel in the trailer for the belly TV.
I find the SWM dish is easier to align than the old SD dish. DirecTV willingly switches service locations for snowbirds twice a year, so we get Phoenix locals in the winter. Switching service more often will force one to Distant Network Services and a separate account.
Chris