Well, there are mini TVs and mini STBs that can run off a 12V supply. It is a few years old, but I just found this on YouTube:
Anyone have experience with a similar fold-away or different style portable dish that works well for FTA? Just curious
WSI WS9036 90cm dish with DG-380 Motor, Titanium PLL-1KS Standard Ku LNBF, and MicroHD receiver. Mini-BUD experiment with same dish, motor, receiver, but with scalar kit and Titanium C1-PLL (DMSi BSC421 as backup). Traxis 3500 backup/test receiver; Avenger PLL321S-2 Universal Ku LNBF for backup.