You could get this $500 “Autonet” offering from Government Motors with bandwidth limits:
Full price for installation is $500 in GM offerings, and you’ll pay $29 every month for 1 GB of service — exceed 1 GB and service stops — or you can plunk down for the 5 GB service. You can use it within 150 feet of your car but there’s no encryption, so a bunch of other folks can use it as well. However, if you just want to get some e-mails and directions, research a few tunes on Songza, and, most importantly, get the kids to be quiet for a spell, it just might be worth it.
Or you could just get a MiFi from Verizon. Works great. Cheaper to buy. Unlimited bandwidth.
Or you could tether your phone to a CradlePoint. Works great. A bit slower than a pure modem, but suitable for casual use.
We RV’d around the country this summer, Internetting all the way throughout the RV, using a Verizon UM150 USB modem and a CradlePoint WiFi router. It worked great except amidst deep forests at high speeds.
Back to Government Motors… this is what happens when your planning loop is 5 years.