We have a RF Mogul RV roof top dish and the DTV HR44 DVR receiver which stores recorded shows that are always available. We also watch minimum live shows instead watch recorded shows skipping the ads. This also means we can watch 2x 1 hr shows is 1 hr.
But we're considering purchasing a portable dish and tripod. If so, it will be the heavy-duty tripod and dish that folds up which helps with storage. The TV4RV is the best equipment I've found which included suggestions from this board and the most expensive. The heavy-duty combo tripod is $170. The dish and LNB is $195. Plus, S&H. Yes, you can buy other equipment and spend less.
I tested how long the coax could be using my home setup and coax from my 18" round dish days. DTV says 150' limit for SWM. With 300' I had 2 signal dropouts in a month. The 300' was made up of 7 sections of coax without the high frequency connectors and barrel connectors needed for the much higher frequency bandwidth required by SWM. Also, this test was in the Phoenix area which has higher satellite signal strength than say Seattle. But I'm confident that 200' if not more would work at my daughters in Seattle.
Also add the cost of coax to the above, say $30 for 100’ of 3 GHz coax which would be adequate length for most CG sites. I’d probably want 2x 100’ plus 50’.