What did you wind up doing? Curious how it worked out. We are RVing, and got a Verizon mifi hotspot, and spend $80 / month for "unlimited" data (which us really just 15 GB before it slows way down). We have an antenna for it and get pretty good reception in most rural areas. We also have a Skyroam hotspot, which has unlimited data for $99/month, but doesn't work in really remote areas.