Streamign NETFLIX is gong to cost you bandwidth
Verizon has long had the best coverage map.. But if you exceed your data limits CHA CHING!!!!!!
AT&T is advertising that they have greatly improved their 4G map,, I took a look at it recently and it is very nearly the same as Verizon's.. I am not familure with AT&T plans so can not tell you about costs or limits or what happens when you exceed the limit.
T-mobile has a "unlimited" plan but the 4-G amount is limited, plus you can bank up to 10 Gigs for later use (So I can burn 17 Gig in a month before they throttle me between my 7 Gig plan and 10 Gig bank).
Sprint/Nextel has very good prices,,, On the face,,, but almost no coverage (RECOMMEND YOU AVOID).
Many other companies... Resell one of the above usually at a discount.
I would try to find an UNLIMITED plan using either AT&T or Verizon.. For reasons that have nothing to do with cell service I am NOT a fan of Verizon.
One neat product Verizon offers (I do not know if the others do yet) is a plug in that connects to the OBD-II port on your Motor home (or car) it provides many services...
Vehicle location (reported to the web)
HOT SPOT
OBD-II to Computer interface (Both via Wi-Fi and Web I think).
Could be useful if your motor home ever takes off without you.